making sure we found all the extremals











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I am curios to know whether there is anyway to be sure that we found all the stationary points using Lagrange multiplier method.?
Thank you.










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  • 1




    By being careful not to drop any solutions on the way?
    – Hagen von Eitzen
    Nov 11 at 13:53












  • not so sure always.
    – sam soft
    Nov 11 at 13:54










  • Your title and your question seem to be about two different things. Are you asking how can you be sure that you find all the maximizers and/or minimizers using the Lagrange multiplier mehtod, or are you asking how can you be sure you found all the stationary points of the Lagrangean? (These are different questions because the maximizer and/or minimizer may not be stationary points of the Lagrangean.)
    – smcc
    Nov 11 at 15:21










  • Do you have a specific example in mind?
    – saulspatz
    Nov 11 at 15:22










  • @smcc Yes i meant the same
    – sam soft
    Nov 11 at 15:23















up vote
0
down vote

favorite












I am curios to know whether there is anyway to be sure that we found all the stationary points using Lagrange multiplier method.?
Thank you.










share|cite|improve this question


















  • 1




    By being careful not to drop any solutions on the way?
    – Hagen von Eitzen
    Nov 11 at 13:53












  • not so sure always.
    – sam soft
    Nov 11 at 13:54










  • Your title and your question seem to be about two different things. Are you asking how can you be sure that you find all the maximizers and/or minimizers using the Lagrange multiplier mehtod, or are you asking how can you be sure you found all the stationary points of the Lagrangean? (These are different questions because the maximizer and/or minimizer may not be stationary points of the Lagrangean.)
    – smcc
    Nov 11 at 15:21










  • Do you have a specific example in mind?
    – saulspatz
    Nov 11 at 15:22










  • @smcc Yes i meant the same
    – sam soft
    Nov 11 at 15:23













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am curios to know whether there is anyway to be sure that we found all the stationary points using Lagrange multiplier method.?
Thank you.










share|cite|improve this question













I am curios to know whether there is anyway to be sure that we found all the stationary points using Lagrange multiplier method.?
Thank you.







derivatives lagrange-multiplier maxima-minima






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share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Nov 11 at 13:52









sam soft

176




176








  • 1




    By being careful not to drop any solutions on the way?
    – Hagen von Eitzen
    Nov 11 at 13:53












  • not so sure always.
    – sam soft
    Nov 11 at 13:54










  • Your title and your question seem to be about two different things. Are you asking how can you be sure that you find all the maximizers and/or minimizers using the Lagrange multiplier mehtod, or are you asking how can you be sure you found all the stationary points of the Lagrangean? (These are different questions because the maximizer and/or minimizer may not be stationary points of the Lagrangean.)
    – smcc
    Nov 11 at 15:21










  • Do you have a specific example in mind?
    – saulspatz
    Nov 11 at 15:22










  • @smcc Yes i meant the same
    – sam soft
    Nov 11 at 15:23














  • 1




    By being careful not to drop any solutions on the way?
    – Hagen von Eitzen
    Nov 11 at 13:53












  • not so sure always.
    – sam soft
    Nov 11 at 13:54










  • Your title and your question seem to be about two different things. Are you asking how can you be sure that you find all the maximizers and/or minimizers using the Lagrange multiplier mehtod, or are you asking how can you be sure you found all the stationary points of the Lagrangean? (These are different questions because the maximizer and/or minimizer may not be stationary points of the Lagrangean.)
    – smcc
    Nov 11 at 15:21










  • Do you have a specific example in mind?
    – saulspatz
    Nov 11 at 15:22










  • @smcc Yes i meant the same
    – sam soft
    Nov 11 at 15:23








1




1




By being careful not to drop any solutions on the way?
– Hagen von Eitzen
Nov 11 at 13:53






By being careful not to drop any solutions on the way?
– Hagen von Eitzen
Nov 11 at 13:53














not so sure always.
– sam soft
Nov 11 at 13:54




not so sure always.
– sam soft
Nov 11 at 13:54












Your title and your question seem to be about two different things. Are you asking how can you be sure that you find all the maximizers and/or minimizers using the Lagrange multiplier mehtod, or are you asking how can you be sure you found all the stationary points of the Lagrangean? (These are different questions because the maximizer and/or minimizer may not be stationary points of the Lagrangean.)
– smcc
Nov 11 at 15:21




Your title and your question seem to be about two different things. Are you asking how can you be sure that you find all the maximizers and/or minimizers using the Lagrange multiplier mehtod, or are you asking how can you be sure you found all the stationary points of the Lagrangean? (These are different questions because the maximizer and/or minimizer may not be stationary points of the Lagrangean.)
– smcc
Nov 11 at 15:21












Do you have a specific example in mind?
– saulspatz
Nov 11 at 15:22




Do you have a specific example in mind?
– saulspatz
Nov 11 at 15:22












@smcc Yes i meant the same
– sam soft
Nov 11 at 15:23




@smcc Yes i meant the same
– sam soft
Nov 11 at 15:23










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Following the procedure going, without any guessing involved, and not dropping any solutions on the way(for example, +- issue) one can be sure, that there were no stationary points left out. You can be sure in that, for example, if you look at the derivation of Euler-Lagrange theorem.






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    Following the procedure going, without any guessing involved, and not dropping any solutions on the way(for example, +- issue) one can be sure, that there were no stationary points left out. You can be sure in that, for example, if you look at the derivation of Euler-Lagrange theorem.






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      up vote
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      Following the procedure going, without any guessing involved, and not dropping any solutions on the way(for example, +- issue) one can be sure, that there were no stationary points left out. You can be sure in that, for example, if you look at the derivation of Euler-Lagrange theorem.






      share|cite|improve this answer








      New contributor




      Farid Hasanov is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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        up vote
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        up vote
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        down vote









        Following the procedure going, without any guessing involved, and not dropping any solutions on the way(for example, +- issue) one can be sure, that there were no stationary points left out. You can be sure in that, for example, if you look at the derivation of Euler-Lagrange theorem.






        share|cite|improve this answer








        New contributor




        Farid Hasanov is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        Following the procedure going, without any guessing involved, and not dropping any solutions on the way(for example, +- issue) one can be sure, that there were no stationary points left out. You can be sure in that, for example, if you look at the derivation of Euler-Lagrange theorem.







        share|cite|improve this answer








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        answered Nov 21 at 11:57









        Farid Hasanov

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