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j4nd3r53n
  • Member for 5 years, 1 month
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51 votes
5 answers
6k views

Say $a=b$. Is "Do the same thing to both sides of an equation, and it still holds" an axiom? [duplicate]

7 votes
1 answer
889 views

How should a good course and textbook in category theory be constructed?

5 votes
1 answer
331 views

Natural transformations correspond bijectively to functors ... - but how?

5 votes
1 answer
183 views

Why are 4 dimensional manifolds 'different'?

4 votes
1 answer
64 views

What is an 'elementary, pure language'?

4 votes
1 answer
239 views

What is the intuition behind quantization?

3 votes
0 answers
148 views

The Mathematics of Quantum Mechanics? [duplicate]

3 votes
0 answers
117 views

Is there a category theoretic definition of emergence?

2 votes
2 answers
106 views

Prove that $a^1 \cong a$

2 votes
4 answers
136 views

Not quite isomorphisms?

2 votes
0 answers
99 views

A pointless question about geometry (or a question about point-free geometry)

1 vote
1 answer
72 views

Is a topology always an initial topology?

1 vote
3 answers
394 views

What is the largest, well-ordered set?

1 vote
0 answers
174 views

Differential geometry in hyperspace

1 vote
0 answers
48 views

An embarrassing question about subobjects

1 vote
1 answer
34 views

Product of objects are isomorphic - help with a diagram

1 vote
2 answers
172 views

Continuity of fixed-points?

1 vote
1 answer
70 views

Show that $C/c \cong (c/(C^{op}))^{op}$ [duplicate]

1 vote
1 answer
101 views

$\frac{a}{b+c}+\frac{b}{a+c}+\frac{c}{a+b}=4$

0 votes
1 answer
111 views

Is there a way to measure symmetry in general?

0 votes
0 answers
47 views

Compact notation for "morphism parameter" of a functor?

0 votes
1 answer
88 views

Given $Hom(X,Y)$, what is the dual, $Hom^{\circ}(X,Y)$