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what does $min()$ and $max()$ mean in a function?



The 2019 Stack Overflow Developer Survey Results Are InWhat does max[] mean?Max Min of function less than Min max of functionHow many dollars does it take to be rich?What does this notation mean as a production function: f = min [t, 1.05k]Applying Slutsky's EquationRestricting the range of a fucntionDetermine the coordinates of any max/min points on functions between 0 ≤ x ≤ 2πWhat do these functions mean?Question about min/max on a closed intervalIntermediate Value Theorem Proofs










0












$begingroup$


Could someone please explain to me what is the difference between these equations how it would affect the result and the way they are solved?



$$Q2(K,L) = Amin(BK,CL)text s.t. A,B,C > 0$$
$$Q2(K,L) = Amax(BK,CL)text s.t. A,B,C > 0$$
$$Q2(K,L) = BK,CLtext s.t. A,B,C > 0$$



(Do note that invented the last two equations so I'm not sure if they make any sense mathematically)



I'm encountering these equations quite often in economics and never really understood how to solve them.



Thank you very much for your help!










share|cite|improve this question











$endgroup$
















    0












    $begingroup$


    Could someone please explain to me what is the difference between these equations how it would affect the result and the way they are solved?



    $$Q2(K,L) = Amin(BK,CL)text s.t. A,B,C > 0$$
    $$Q2(K,L) = Amax(BK,CL)text s.t. A,B,C > 0$$
    $$Q2(K,L) = BK,CLtext s.t. A,B,C > 0$$



    (Do note that invented the last two equations so I'm not sure if they make any sense mathematically)



    I'm encountering these equations quite often in economics and never really understood how to solve them.



    Thank you very much for your help!










    share|cite|improve this question











    $endgroup$














      0












      0








      0





      $begingroup$


      Could someone please explain to me what is the difference between these equations how it would affect the result and the way they are solved?



      $$Q2(K,L) = Amin(BK,CL)text s.t. A,B,C > 0$$
      $$Q2(K,L) = Amax(BK,CL)text s.t. A,B,C > 0$$
      $$Q2(K,L) = BK,CLtext s.t. A,B,C > 0$$



      (Do note that invented the last two equations so I'm not sure if they make any sense mathematically)



      I'm encountering these equations quite often in economics and never really understood how to solve them.



      Thank you very much for your help!










      share|cite|improve this question











      $endgroup$




      Could someone please explain to me what is the difference between these equations how it would affect the result and the way they are solved?



      $$Q2(K,L) = Amin(BK,CL)text s.t. A,B,C > 0$$
      $$Q2(K,L) = Amax(BK,CL)text s.t. A,B,C > 0$$
      $$Q2(K,L) = BK,CLtext s.t. A,B,C > 0$$



      (Do note that invented the last two equations so I'm not sure if they make any sense mathematically)



      I'm encountering these equations quite often in economics and never really understood how to solve them.



      Thank you very much for your help!







      functions economics






      share|cite|improve this question















      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Mar 31 at 0:30









      idriskameni

      751321




      751321










      asked Mar 30 at 22:12









      FozoroFozoro

      1266




      1266




















          2 Answers
          2






          active

          oldest

          votes


















          3












          $begingroup$

          Usually $min(x,y)$ denotes the smallest of $x$ and $y$, and $max(x,y)$ the greatest.






          share|cite|improve this answer









          $endgroup$












          • $begingroup$
            Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
            $endgroup$
            – Fozoro
            Mar 30 at 22:18











          • $begingroup$
            It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
            $endgroup$
            – Bernard
            Mar 30 at 22:20


















          2












          $begingroup$

          Here is a possible interpretation of such a function.



          $$Q(B,S,N) = min(frac12B,frac16S, frac112N)text s.t. B,S,N, Q in mathbb N_0$$



          This function can be seen as production function of a chair. You probably need $2$ boards ($B$) for the back rest and the seat surface. $6$ wooden sticks ($S$): 4 for the chair legs and 2 to fix the back rest. And probably $12$ nails (N) to fix all the parts



          Now with Q you can evaluate how many chairs you can produce if some quantities of boards, wooden sticks and nails are available. Let´s say $B=30, S=100, N=190$ Then the output of the production is



          $$minleft(frac12cdot 30,frac16cdot 100, frac112cdot 190right)=minleft(15,16frac23, 15frac56right)=15 colorgreytextrmchairs$$






          share|cite|improve this answer









          $endgroup$












          • $begingroup$
            though how does the $min()$ change the answer?
            $endgroup$
            – Fozoro
            Mar 31 at 12:33










          • $begingroup$
            @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
            $endgroup$
            – callculus
            Mar 31 at 13:26











          • $begingroup$
            so basically it tells us to solve the function with the smallest numbers possible, is that correct?
            $endgroup$
            – Fozoro
            Mar 31 at 13:47










          • $begingroup$
            @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
            $endgroup$
            – callculus
            Mar 31 at 14:00












          Your Answer





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          2 Answers
          2






          active

          oldest

          votes








          2 Answers
          2






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          3












          $begingroup$

          Usually $min(x,y)$ denotes the smallest of $x$ and $y$, and $max(x,y)$ the greatest.






          share|cite|improve this answer









          $endgroup$












          • $begingroup$
            Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
            $endgroup$
            – Fozoro
            Mar 30 at 22:18











          • $begingroup$
            It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
            $endgroup$
            – Bernard
            Mar 30 at 22:20















          3












          $begingroup$

          Usually $min(x,y)$ denotes the smallest of $x$ and $y$, and $max(x,y)$ the greatest.






          share|cite|improve this answer









          $endgroup$












          • $begingroup$
            Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
            $endgroup$
            – Fozoro
            Mar 30 at 22:18











          • $begingroup$
            It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
            $endgroup$
            – Bernard
            Mar 30 at 22:20













          3












          3








          3





          $begingroup$

          Usually $min(x,y)$ denotes the smallest of $x$ and $y$, and $max(x,y)$ the greatest.






          share|cite|improve this answer









          $endgroup$



          Usually $min(x,y)$ denotes the smallest of $x$ and $y$, and $max(x,y)$ the greatest.







          share|cite|improve this answer












          share|cite|improve this answer



          share|cite|improve this answer










          answered Mar 30 at 22:16









          BernardBernard

          124k741117




          124k741117











          • $begingroup$
            Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
            $endgroup$
            – Fozoro
            Mar 30 at 22:18











          • $begingroup$
            It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
            $endgroup$
            – Bernard
            Mar 30 at 22:20
















          • $begingroup$
            Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
            $endgroup$
            – Fozoro
            Mar 30 at 22:18











          • $begingroup$
            It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
            $endgroup$
            – Bernard
            Mar 30 at 22:20















          $begingroup$
          Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
          $endgroup$
          – Fozoro
          Mar 30 at 22:18





          $begingroup$
          Thank you very much for your answer Bernard! How would this influence the way we would solve this equation? if you could maybe show some kind of example that would be amazing (with a different equation if it's easier)
          $endgroup$
          – Fozoro
          Mar 30 at 22:18













          $begingroup$
          It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
          $endgroup$
          – Bernard
          Mar 30 at 22:20




          $begingroup$
          It does not seem to be an equation, but the definition of a function of the two variables $K$ and $L$, as far as I understand, not knowing the context.
          $endgroup$
          – Bernard
          Mar 30 at 22:20











          2












          $begingroup$

          Here is a possible interpretation of such a function.



          $$Q(B,S,N) = min(frac12B,frac16S, frac112N)text s.t. B,S,N, Q in mathbb N_0$$



          This function can be seen as production function of a chair. You probably need $2$ boards ($B$) for the back rest and the seat surface. $6$ wooden sticks ($S$): 4 for the chair legs and 2 to fix the back rest. And probably $12$ nails (N) to fix all the parts



          Now with Q you can evaluate how many chairs you can produce if some quantities of boards, wooden sticks and nails are available. Let´s say $B=30, S=100, N=190$ Then the output of the production is



          $$minleft(frac12cdot 30,frac16cdot 100, frac112cdot 190right)=minleft(15,16frac23, 15frac56right)=15 colorgreytextrmchairs$$






          share|cite|improve this answer









          $endgroup$












          • $begingroup$
            though how does the $min()$ change the answer?
            $endgroup$
            – Fozoro
            Mar 31 at 12:33










          • $begingroup$
            @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
            $endgroup$
            – callculus
            Mar 31 at 13:26











          • $begingroup$
            so basically it tells us to solve the function with the smallest numbers possible, is that correct?
            $endgroup$
            – Fozoro
            Mar 31 at 13:47










          • $begingroup$
            @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
            $endgroup$
            – callculus
            Mar 31 at 14:00
















          2












          $begingroup$

          Here is a possible interpretation of such a function.



          $$Q(B,S,N) = min(frac12B,frac16S, frac112N)text s.t. B,S,N, Q in mathbb N_0$$



          This function can be seen as production function of a chair. You probably need $2$ boards ($B$) for the back rest and the seat surface. $6$ wooden sticks ($S$): 4 for the chair legs and 2 to fix the back rest. And probably $12$ nails (N) to fix all the parts



          Now with Q you can evaluate how many chairs you can produce if some quantities of boards, wooden sticks and nails are available. Let´s say $B=30, S=100, N=190$ Then the output of the production is



          $$minleft(frac12cdot 30,frac16cdot 100, frac112cdot 190right)=minleft(15,16frac23, 15frac56right)=15 colorgreytextrmchairs$$






          share|cite|improve this answer









          $endgroup$












          • $begingroup$
            though how does the $min()$ change the answer?
            $endgroup$
            – Fozoro
            Mar 31 at 12:33










          • $begingroup$
            @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
            $endgroup$
            – callculus
            Mar 31 at 13:26











          • $begingroup$
            so basically it tells us to solve the function with the smallest numbers possible, is that correct?
            $endgroup$
            – Fozoro
            Mar 31 at 13:47










          • $begingroup$
            @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
            $endgroup$
            – callculus
            Mar 31 at 14:00














          2












          2








          2





          $begingroup$

          Here is a possible interpretation of such a function.



          $$Q(B,S,N) = min(frac12B,frac16S, frac112N)text s.t. B,S,N, Q in mathbb N_0$$



          This function can be seen as production function of a chair. You probably need $2$ boards ($B$) for the back rest and the seat surface. $6$ wooden sticks ($S$): 4 for the chair legs and 2 to fix the back rest. And probably $12$ nails (N) to fix all the parts



          Now with Q you can evaluate how many chairs you can produce if some quantities of boards, wooden sticks and nails are available. Let´s say $B=30, S=100, N=190$ Then the output of the production is



          $$minleft(frac12cdot 30,frac16cdot 100, frac112cdot 190right)=minleft(15,16frac23, 15frac56right)=15 colorgreytextrmchairs$$






          share|cite|improve this answer









          $endgroup$



          Here is a possible interpretation of such a function.



          $$Q(B,S,N) = min(frac12B,frac16S, frac112N)text s.t. B,S,N, Q in mathbb N_0$$



          This function can be seen as production function of a chair. You probably need $2$ boards ($B$) for the back rest and the seat surface. $6$ wooden sticks ($S$): 4 for the chair legs and 2 to fix the back rest. And probably $12$ nails (N) to fix all the parts



          Now with Q you can evaluate how many chairs you can produce if some quantities of boards, wooden sticks and nails are available. Let´s say $B=30, S=100, N=190$ Then the output of the production is



          $$minleft(frac12cdot 30,frac16cdot 100, frac112cdot 190right)=minleft(15,16frac23, 15frac56right)=15 colorgreytextrmchairs$$







          share|cite|improve this answer












          share|cite|improve this answer



          share|cite|improve this answer










          answered Mar 31 at 2:33









          callculuscallculus

          18.7k31428




          18.7k31428











          • $begingroup$
            though how does the $min()$ change the answer?
            $endgroup$
            – Fozoro
            Mar 31 at 12:33










          • $begingroup$
            @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
            $endgroup$
            – callculus
            Mar 31 at 13:26











          • $begingroup$
            so basically it tells us to solve the function with the smallest numbers possible, is that correct?
            $endgroup$
            – Fozoro
            Mar 31 at 13:47










          • $begingroup$
            @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
            $endgroup$
            – callculus
            Mar 31 at 14:00

















          • $begingroup$
            though how does the $min()$ change the answer?
            $endgroup$
            – Fozoro
            Mar 31 at 12:33










          • $begingroup$
            @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
            $endgroup$
            – callculus
            Mar 31 at 13:26











          • $begingroup$
            so basically it tells us to solve the function with the smallest numbers possible, is that correct?
            $endgroup$
            – Fozoro
            Mar 31 at 13:47










          • $begingroup$
            @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
            $endgroup$
            – callculus
            Mar 31 at 14:00
















          $begingroup$
          though how does the $min()$ change the answer?
          $endgroup$
          – Fozoro
          Mar 31 at 12:33




          $begingroup$
          though how does the $min()$ change the answer?
          $endgroup$
          – Fozoro
          Mar 31 at 12:33












          $begingroup$
          @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
          $endgroup$
          – callculus
          Mar 31 at 13:26





          $begingroup$
          @Fozoro The min function selects the lowest number of the three numbers since for every chair certain numbers of boards, wooden sticks and nails are needed. In this example the number of chairs is a positive integer. That means that you have to round off the numbers.
          $endgroup$
          – callculus
          Mar 31 at 13:26













          $begingroup$
          so basically it tells us to solve the function with the smallest numbers possible, is that correct?
          $endgroup$
          – Fozoro
          Mar 31 at 13:47




          $begingroup$
          so basically it tells us to solve the function with the smallest numbers possible, is that correct?
          $endgroup$
          – Fozoro
          Mar 31 at 13:47












          $begingroup$
          @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
          $endgroup$
          – callculus
          Mar 31 at 14:00





          $begingroup$
          @Fozoro Yes, if there are no other restrictions then $min(3.42, 5.2, 4.1)=3.42$
          $endgroup$
          – callculus
          Mar 31 at 14:00


















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