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Just when I thought I was out, they pull me back in
20h

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Diffusion Equation
I would also suggest that you do your homework yourself or ask your instructor for guidance. 
20h

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Diffusion Equation
This question appears to be offtopic because we are not a site or a community that does your homework for you. 
20h

revised 
Diffusion Equation
removed erroneous tags 
1d

reviewed  Leave Open If 2manifolds are homeomorphic and smooth, are they diffeomorphic? 
2d

reviewed  Leave Open Is elliptic curve point division defined over the field of real numbers? 
2d

reviewed  Leave Open “Productively normal” space 
2d

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Mathematical induction understanding
This question is offtopic: see mathoverflow.net/help/ontopic for an explanation why 
2d

reviewed  Looks OK 'etale topology 
Nov 20 
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Rational Conjugacy Classes of Finite Groups
Perhaps this later question mathoverflow.net/questions/187529/… is related? 
Nov 20 
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Rational conjugation of elements of a finite group
An earlier question which may be related to this one? mathoverflow.net/questions/186581/… 
Nov 19 
reviewed  Close Robotics, Cryptography, and Genetics applications of Grothendieck's work? 
Nov 19 
reviewed  Reopen not Gauss sum with the same magnitude 
Nov 19 
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What makes the amenability of Thompsons group $F$ such a tricky problem?
@DavidLHarden Also, see this from Tobias's question: "some aspect that makes so many serious mathematicians convince themselves that they have a solution, and so many other serious mathematicians to take so long to find the errors?" 
Nov 19 
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What makes the amenability of Thompsons group $F$ such a tricky problem?
@DavidLHarden I am not sure I agree with your comment. The key feature of the problem for Thompson F is that people have made serious claims for and against its amenability. This distinguishes it from problems like Jacobian conjecture, Collatz, RH etc where most failed attempts seek a positive answer 
Nov 18 
reviewed  Leave Open not Gauss sum with the same magnitude 
Nov 18 
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Contractively complemented subspaces of $c_0(I)$
"Has" is correct; "have" is not. (So I have rolled back your change) 
Nov 18 
revised 
Contractively complemented subspaces of $c_0(I)$
rolled back to a previous revision 
Nov 18 
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Polyhedron and Euclidean space
This question should be closed because the poster wants other people to supply answers for use in a contest 
Nov 17 
reviewed  Close Tetris in 3D with 5 units 
Nov 17 
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Literature on ellipses
This question might be more suited to math.stackexchange.com which is geared towards general questions in maths. (MO is geared towards questions and answers for academic researchers in mathematics) 