the objective funtion is not convex,why? How do I prove that objective function is not convex? [closed]

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in the paper, Eq.4 , the author said that this function is joint non-convex,But I don't know how to make sure that the formula is joint non-convex. I didn't find this type of explanation on the Internet.sorry， how to edit the formula here, so I paste the original link here:



title: Multi-Label Informed Feature Selection
links: https://www.ijcai.org/Proceedings/16/Papers/233.pdf




convex-analysis




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closed as off-topic by Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne Aug 1 at 17:02


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne
If this question can be reworded to fit the rules in the help center, please edit the question.












  • ijcai.org/Proceedings/16/Papers/233.pdf this is the paper
    – li lili
    Aug 1 at 8:28











  • Please do not use pictures for critical portions of your post. Pictures may not be legible, cannot be searched and are not view-able to some, such as those who use screen readers. It also shows as a distinct lack of effort on your end, so how could you expect anything but the same from ours?
    – Simply Beautiful Art
    Aug 1 at 14:37










  • sorry ,I am using this community for the first time, let me modify the question.
    – li lili
    Aug 2 at 1:18














up vote
-3
down vote

favorite












in the paper, Eq.4 , the author said that this function is joint non-convex,But I don't know how to make sure that the formula is joint non-convex. I didn't find this type of explanation on the Internet.sorry， how to edit the formula here, so I paste the original link here:



title: Multi-Label Informed Feature Selection
links: https://www.ijcai.org/Proceedings/16/Papers/233.pdf




convex-analysis




share|cite|improve this question













closed as off-topic by Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne Aug 1 at 17:02


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne
If this question can be reworded to fit the rules in the help center, please edit the question.












  • ijcai.org/Proceedings/16/Papers/233.pdf this is the paper
    – li lili
    Aug 1 at 8:28











  • Please do not use pictures for critical portions of your post. Pictures may not be legible, cannot be searched and are not view-able to some, such as those who use screen readers. It also shows as a distinct lack of effort on your end, so how could you expect anything but the same from ours?
    – Simply Beautiful Art
    Aug 1 at 14:37










  • sorry ,I am using this community for the first time, let me modify the question.
    – li lili
    Aug 2 at 1:18












up vote
-3
down vote

favorite









up vote
-3
down vote

favorite











in the paper, Eq.4 , the author said that this function is joint non-convex,But I don't know how to make sure that the formula is joint non-convex. I didn't find this type of explanation on the Internet.sorry， how to edit the formula here, so I paste the original link here:



title: Multi-Label Informed Feature Selection
links: https://www.ijcai.org/Proceedings/16/Papers/233.pdf




convex-analysis




share|cite|improve this question













in the paper, Eq.4 , the author said that this function is joint non-convex,But I don't know how to make sure that the formula is joint non-convex. I didn't find this type of explanation on the Internet.sorry， how to edit the formula here, so I paste the original link here:



title: Multi-Label Informed Feature Selection
links: https://www.ijcai.org/Proceedings/16/Papers/233.pdf





convex-analysis





share|cite|improve this question












share|cite|improve this question




share|cite|improve this question








edited Aug 2 at 1:44
























asked Aug 1 at 8:22









li lili

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closed as off-topic by Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne Aug 1 at 17:02


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne
If this question can be reworded to fit the rules in the help center, please edit the question.




closed as off-topic by Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne Aug 1 at 17:02


This question appears to be off-topic. The users who voted to close gave this specific reason:


  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Math1000, Mathmo123, Taroccoesbrocco, Simply Beautiful Art, Isaac Browne
If this question can be reworded to fit the rules in the help center, please edit the question.











  • ijcai.org/Proceedings/16/Papers/233.pdf this is the paper
    – li lili
    Aug 1 at 8:28











  • Please do not use pictures for critical portions of your post. Pictures may not be legible, cannot be searched and are not view-able to some, such as those who use screen readers. It also shows as a distinct lack of effort on your end, so how could you expect anything but the same from ours?
    – Simply Beautiful Art
    Aug 1 at 14:37










  • sorry ,I am using this community for the first time, let me modify the question.
    – li lili
    Aug 2 at 1:18
















  • ijcai.org/Proceedings/16/Papers/233.pdf this is the paper
    – li lili
    Aug 1 at 8:28











  • Please do not use pictures for critical portions of your post. Pictures may not be legible, cannot be searched and are not view-able to some, such as those who use screen readers. It also shows as a distinct lack of effort on your end, so how could you expect anything but the same from ours?
    – Simply Beautiful Art
    Aug 1 at 14:37










  • sorry ,I am using this community for the first time, let me modify the question.
    – li lili
    Aug 2 at 1:18















ijcai.org/Proceedings/16/Papers/233.pdf this is the paper
– li lili
Aug 1 at 8:28





ijcai.org/Proceedings/16/Papers/233.pdf this is the paper
– li lili
Aug 1 at 8:28













Please do not use pictures for critical portions of your post. Pictures may not be legible, cannot be searched and are not view-able to some, such as those who use screen readers. It also shows as a distinct lack of effort on your end, so how could you expect anything but the same from ours?
– Simply Beautiful Art
Aug 1 at 14:37




Please do not use pictures for critical portions of your post. Pictures may not be legible, cannot be searched and are not view-able to some, such as those who use screen readers. It also shows as a distinct lack of effort on your end, so how could you expect anything but the same from ours?
– Simply Beautiful Art
Aug 1 at 14:37












sorry ,I am using this community for the first time, let me modify the question.
– li lili
Aug 2 at 1:18




sorry ,I am using this community for the first time, let me modify the question.
– li lili
Aug 2 at 1:18















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