Toby Bartels

http://TobyBartels.name/

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Is there a convenient differential calculus for cojets?

dg.differential-geometry differentials differential-calculus asked Apr 3 '11 at 18:55

mathoverflow.net

21 votes

Who was Heinrich Hake?

ho.history-overview integration biography asked Jan 29 '18 at 21:32

mathoverflow.net

14 votes

W-completion of a C-algebra?

oa.operator-algebras von-neumann-algebras asked Aug 1 '11 at 18:10

mathoverflow.net

12 votes

Combination topological space and locale?

ct.category-theory gn.general-topology locales asked Sep 25 at 22:54

mathoverflow.net

10 votes

Which W-algebras are the duals of C-coalgebras?

fa.functional-analysis oa.operator-algebras c-star-algebras von-neumann-algebras coalgebras asked Aug 26 '12 at 8:08

mathoverflow.net

8 votes

Cardinal numbers vs collections of cardinal numbers

set-theory asked Dec 22 '10 at 9:14

mathoverflow.net

7 votes

Foundations: Existence of uncountable ordinals.

lo.logic set-theory foundations ordinal-numbers asked Sep 8 '11 at 21:03

mathoverflow.net

7 votes

Sober except not $T_0$?

gn.general-topology asked Aug 6 '11 at 1:05

mathoverflow.net

7 votes

Is there a symbol for ‘equal if defined’

logic notation asked Jan 22 '16 at 20:20

math.stackexchange.com

6 votes

Terminology for sequences/functions that approach each other

real-analysis sequences-and-series asymptotics asked Jun 28 '13 at 7:08

mathoverflow.net

Top Answers

What is the most useful non-existing object of your field?

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Segal's Original Definition of a Topological Category

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Not quite adjoint functors

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The formal p-adic numbers

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Observables and dimensional analysis

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matheducators.stackexchange.com

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matheducators.stackexchange.com

Set theories without “junk” theorems?

mathoverflow.net

Show that $f(a)=f(a-1).$

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Math blog directory

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Toby Bartels

Is there a convenient differential calculus for cojets?

Who was Heinrich Hake?

W-completion of a C-algebra?

Combination topological space and locale?

Which W-algebras are the duals of C-coalgebras?

Cardinal numbers vs collections of cardinal numbers

Foundations: Existence of uncountable ordinals.

Sober except not $T_0$?

Is there a symbol for ‘equal if defined’

Terminology for sequences/functions that approach each other