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William Bell's user avatar
William Bell's user avatar
William Bell's user avatar
William Bell
  • Member for 5 years, 2 months
  • Last seen more than 2 years ago
11 votes
1 answer
148 views

What's stopping us from defining isomorphism in general?

4 votes
1 answer
135 views

What is the maximal ideal used to construct the Hyperreals?

3 votes
1 answer
506 views

Does the law of the excluded middle hold for finite sets in intuitionist set theory?

2 votes
0 answers
59 views

Result about matrix exponentials and projections that seems like I should be able to cite someone as discovering it

2 votes
0 answers
103 views

Why should I look at the Resolvent formalism and think it is a useful tool for spectral theory?

1 vote
1 answer
91 views

How can it be true both that Complete Ordered Fields are unique up to isomorphism and that anything that can prove Peano Arithmetic is incomplete?

1 vote
1 answer
227 views

Continuity of a solution of a differential equation with respect to a time-dependent input?

0 votes
0 answers
34 views

Does anyone know when/in what work Dedekind introduced the concept of a Euclidean domain?

0 votes
1 answer
124 views

Constructive mathematics plus existence of discontinuous functions

0 votes
0 answers
110 views

Under what conditions is a polynomial root perturbation problem singular?

0 votes
1 answer
64 views

Does this "averaging" function reproduce the same function in $L^1$?