Todd Trimble

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Name Todd Trimble
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Surreal Numbers as Inductive Type?

jan 31 12 at 11:23 kow 251●1●2

6

6
9
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2
answers
386
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Using ends to construct categorical fixed points

feb 1 10 at 21:04 Tom Leinster 13.5k●1●40●82

3
8
votes
1
answer
238
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Does the 2-category of toposes admit pseudo-colimits?

mar 28 11 at 21:40 Todd Trimble 22.3k●1●62●96

3

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299

Answers
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95
Why is differentiating mechanics and integration art? (2)
52
Examples of categorification (6)
51
What’s a mathematician to do?
44
Why do categorical foundationalists want to escape set theory?
38
“Mathematics talk” for five year olds
35
Do these properties characterize differentiation?
34
Elementary+Short+Useful
27
How should one think about non-Hausdorff topologies?
24
Completion of a category
22
to what extent does the category Cov(X) determine a topological space X?
21
Lawvere theories versus classical universal algebra
21
Is the empty graph a tree?
21
How do I explain the number e to a ten year old?
20
“A gentleman never chooses a basis.”
19
Which functions of one variable are derivatives ?
19
Intuition for coends
18
Dimensional Analysis in Mathematics
18
Fundamental groups of topological groups.
17
Why are monads useful?
17
Is there only one natural transformation from the product functor to itself?
16
Could $F_\infty \rtimes Z$ be isomorphic to $F_\infty$?
16
Symmetric structures on Vect
16
Unit sphere in R^\infty is contractible?
16
Polynomial Rings
15
Why pullback only defined up-to-isomorphism but nevertheless presented as functor?
15
Elementary Number Theory Text from a Categorical Perspective
15
The category of abelian group objects
15
Noncontractible connected topological rings ?
15
Is the non-triviality of the algebraic dual of an infinite-dimensional vector space equivalent to the axiom of choice?
14
Gossip about Grothendieck and distributive lattices
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