Neat Summation Notation for Multivariate Polynomials












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For a single-variable polynomial we can write it nicely in summation notation as $$p(x)=sum_{k=0}^n a_kx^k$$.



How about multivariate polynomials, for instance $p(x,y,z)$? Is there any neat notation to describe a typical polynomial?



Thanks.










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    1












    $begingroup$


    For a single-variable polynomial we can write it nicely in summation notation as $$p(x)=sum_{k=0}^n a_kx^k$$.



    How about multivariate polynomials, for instance $p(x,y,z)$? Is there any neat notation to describe a typical polynomial?



    Thanks.










    share|cite|improve this question









    $endgroup$















      1












      1








      1





      $begingroup$


      For a single-variable polynomial we can write it nicely in summation notation as $$p(x)=sum_{k=0}^n a_kx^k$$.



      How about multivariate polynomials, for instance $p(x,y,z)$? Is there any neat notation to describe a typical polynomial?



      Thanks.










      share|cite|improve this question









      $endgroup$




      For a single-variable polynomial we can write it nicely in summation notation as $$p(x)=sum_{k=0}^n a_kx^k$$.



      How about multivariate polynomials, for instance $p(x,y,z)$? Is there any neat notation to describe a typical polynomial?



      Thanks.







      polynomials notation






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      asked Jan 1 at 11:54









      yoyosteinyoyostein

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          $begingroup$

          Yeah, you can write it as



          $$p(x,y,z) = sum_{i=0}^{n_1}sum_{j=0}^{n_2}sum_{k=0}^{n_3} a_{i,j,k}x^iy^jz^k$$






          share|cite|improve this answer









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            1 Answer
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            1 Answer
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            $begingroup$

            Yeah, you can write it as



            $$p(x,y,z) = sum_{i=0}^{n_1}sum_{j=0}^{n_2}sum_{k=0}^{n_3} a_{i,j,k}x^iy^jz^k$$






            share|cite|improve this answer









            $endgroup$


















              2












              $begingroup$

              Yeah, you can write it as



              $$p(x,y,z) = sum_{i=0}^{n_1}sum_{j=0}^{n_2}sum_{k=0}^{n_3} a_{i,j,k}x^iy^jz^k$$






              share|cite|improve this answer









              $endgroup$
















                2












                2








                2





                $begingroup$

                Yeah, you can write it as



                $$p(x,y,z) = sum_{i=0}^{n_1}sum_{j=0}^{n_2}sum_{k=0}^{n_3} a_{i,j,k}x^iy^jz^k$$






                share|cite|improve this answer









                $endgroup$



                Yeah, you can write it as



                $$p(x,y,z) = sum_{i=0}^{n_1}sum_{j=0}^{n_2}sum_{k=0}^{n_3} a_{i,j,k}x^iy^jz^k$$







                share|cite|improve this answer












                share|cite|improve this answer



                share|cite|improve this answer










                answered Jan 1 at 11:59









                Erik ParkinsonErik Parkinson

                8549




                8549






























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