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Georg Lehner's user avatar
Georg Lehner's user avatar
Georg Lehner's user avatar
Georg Lehner
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Post-Doc at FU Berlin. My interests are in differential and algebraic geometry, higher category theory, low dimensional topology and everything related.

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Top posts
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29
The philosophy behind local rings
Nov 24, 2016
25
A geometric theory of Blueprints? (Algebras over the field with one element)
Dec 12, 2015
24
Examples of $(\infty,1)$-topoi that are not given as sheaves on a Grothendieck topology
Jun 26, 2017
18
Alternate proofs of Hilberts Basis Theorem
Nov 7, 2015
17
The analogy between dualizable categories and compact Hausdorff spaces
Jul 8
14
Is there a universal property characterizing the category of compact Hausdorff spaces?
Jan 26, 2023
13
Relating two different approaches to the Atiyah-Hirzebruch Spectral Sequence
Mar 2, 2018
11
The set of subgroups of $F_2$
Jul 13, 2016
10
Definition of $Fun^G( \mathcal C, \mathcal D)$ in the setting of quasicategories
Feb 7, 2019
9
"Generalized theory of polynomials" for a given commutative Lawvere Theory
Jul 22, 2015
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11
You've got your head round Basic Category Theory: why look at monads next?
7
Examples of toposes in which the Axiom of Determinacy holds.