Ingo Blechschmidt has contributed to 281 nLab pages.

dense topology | 10:58:22, January 23 2023 |

algebraic space | 19:53:58, October 15 2020 |

ETCS | 20:30:51, January 19 2020 |

Atiyah–Hirzebruch spectral sequence | 22:40:13, July 22 2019 |

crystalline site | 08:10:32, April 03 2019 |

well-ordering theorem | 14:38:22, November 13 2018 |

cubical set - exposition | 22:36:26, November 08 2018 |

inductive family | 22:24:28, October 03 2018 |

localic geometric morphism | 11:38:40, October 03 2018 |

homotopy type theory | 17:55:02, September 24 2018 |

why (infinity,1)-categories? | 11:07:43, September 11 2018 |

scattering amplitude | 19:25:41, July 16 2018 |

fan theorem | 12:12:15, July 13 2018 |

functorial geometry | 19:53:44, July 09 2018 |

logic symbols -- table | 14:16:45, July 03 2018 |

good open cover | 18:25:08, June 13 2018 |

Sandbox | 17:28:05, June 13 2018 |

Sandbox | 17:27:17, June 13 2018 |

direct image | 17:15:49, June 13 2018 |

flabby sheaf | 17:14:38, June 13 2018 |

geometry of physics -- supergeometry | 17:02:24, June 13 2018 |

Sandbox | 16:48:54, June 13 2018 |

connected topos | 18:03:37, February 14 2018 |

surjective geometric morphism | 18:01:14, February 14 2018 |

Sandbox | 12:39:57, February 12 2018 |

sober topological space | 09:38:29, February 11 2018 |

sheaf | 20:22:25, February 06 2018 |

absolute Galois group | 21:07:51, February 03 2018 |

braided monoidal category | 19:30:29, February 03 2018 |

braided monoidal category | 18:24:54, February 03 2018 |

- (infinity,1)-category of (infinity,1)-categories
- (infinity,1)-sheaf
- 2-sheaf
- 3x3 lemma
- abelian category
- absolute differential form
- absolute Galois group
- action functional
- additive functor
- adjoint functor theorem
- adjoint modality
- adjoint triple
- affine line
- affine scheme
- algebraic space
- Artin gluing
- Atiyah–Hirzebruch spectral sequence
- atom
- Aufhebung
- axion
- balanced category
- Banach coalgebra
- base topos
- Betti number
- big and little toposes
- Bohr topos
- Borel's theorem
- Borger's absolute geometry
- braided monoidal category
- Bézout domain
- canonical bundle
- Cantor's theorem
- category of sheaves
- causal perturbation theory
- chain homotopy
- classical context
- classical state
- classifying topos
- closed morphism
- co-Yoneda lemma
- coherent logic
- coherent module
- coherent ring
- cohesive homotopy type theory
- coinvariant
- colimits in categories of algebras
- combinatorial model category
- commutator subgroup
- compact object
- compact space
- completely prime filter
- completion of a ring
- computable function
- computad
- concrete sheaf
- connected object
- connected topos
- conservative functor
- continuous map
- corepresentable functor
- coverage
- covert space
- crystalline site
- cubical set - exposition
- dagger category
- De Morganization
- Dedekind cut
- deformation theory
- degree of a coherent sheaf
- Demazure, lectures on p-divisible groups, I.3, open- and closed subfunctors; schemes
- dense sub-site
- dense topology
- density
- derived functor
- dg-localization
- diagram chasing
- direct image
- directional derivative
- divisor (algebraic geometry)
- double negation
- Eckmann-Hilton argument
- Einstein summation convention
- element in an abelian category
- end
- equivalence of types
- equivariant bundle
- equivariant derived category
- essential sublocale
- essential subtopos
- essentially algebraic theory
- ETCS
- Euler characteristic
- Euler-Lagrange equation
- Ext
- fan theorem
- fiber
- field
- field with one element
- filtered category
- filtered colimit
- finite field
- finite set
- finitely generated object
- FinSet
- five lemma
- flabby sheaf
- flat connection
- focal point
- formal spectrum
- fpqc topology
- fracture theorem
- frame of opens
- free cocompletion
- free resolution
- Frobenius reciprocity
- Fréchet space
- functorial geometry
- fundamental group
- fundamental group of a topos
- fundamental theorem of algebra
- geogebra
- geometric point
- geometric realization
- geometry of physics -- supergeometry
- germ of a space
- good open cover
- Grothendieck fibration
- Grothendieck spectral sequence
- Grothendieck topology
- Heyting category
- Hochschild cohomology
- homotopy type theory
- hyperconnected geometric morphism
- ind-object
- ind-pro-object
- indexed category
- inductive family
- infinitesimal object
- Ingo Blechschmidt
- injective object
- integral transforms on sheaves
- internal diagram
- internal hom
- internal logic
- internal sheaf
- Introduction to Stable Homotopy Theory
- Jacques Penon
- Jordan algebra
- Kleisli category
- Kähler differential
- Lambda-ring
- Lie groupoid
- limits and colimits by example
- linear algebra
- local geometric morphism
- local ring
- localic geometric morphism
- localic topos
- locally algebraic scheme
- locally cartesian closed (infinity,1)-category
- locally cartesian closed category
- locally compact locale
- locally internal category
- locally presentable categories - introduction
- locally presentable category
- locally ringed topological space
- logic symbols -- table
- logical functor
- Manfred Lehn
- mapping cylinder
- mapping telescope
- Massey product
- metric jet
- microlinear space
- Mod
- models in presheaf toposes
- moduli stack of elliptic curves
- monad in algebraic geometry
- morphism of finite presentation
- morphism of finite type
- motivation for cohesive toposes
- motivation for higher differential geometry
- motivation for sheaves, cohomology and higher stacks
- natural number
- nilpotent ideal
- normal bundle
- one-sided real number
- open morphism
- open subtopos
- order-theoretic structure in quantum mechanics
- over-(infinity,1)-category
- over-topos
- overt space
- p-adic number
- partial map classifier
- perfect chain complex
- plus construction on presheaves
- point of a topos
- polyfold
- poset of commutative subalgebras
- positive element
- preconditioner
- primitive element
- principal ideal domain
- pro-étale site
- profinite group
- projective module
- proper geometric morphism
- quantale
- quantum computation
- quantum harmonic oscillator
- quantum information theory via dagger-compact categories
- quantum mechanics
- quasicoherent sheaf
- Quillen exact category
- quotient category
- ramification of ideals
- rank
- rank of a coherent sheaf
- realizability
- reduced scheme
- reflective subcategory
- relative scheme
- salamander lemma
- Sandbox
- scattering amplitude
- schemes are sober
- Serre subcategory
- Serre-Swan theorem
- Set
- shape theory
- sheaf
- sheafification
- sieve
- simple object
- Sketches of an Elephant
- slope of a coherent sheaf
- smooth topos
- sober topological space
- spectral sequence of a filtered complex
- stable (infinity,1)-category
- stable proposition
- stable vector bundle
- stack semantics
- state
- strict 2-limit
- strict initial object
- string theory FAQ
- structured (infinity,1)-topos
- subobject classifier
- subsingleton
- sugaring
- surjective geometric morphism
- synthetic differential geometry
- synthetic differential geometry applied to algebraic geometry
- synthetic mathematics
- t-structure
- tensor product
- tensor product of chain complexes
- tensor product of functors
- tensor product of modules
- The Rising Sea
- Theta characteristic
- tiny object
- topos of types
- Tor
- tripos
- twisted complex
- Tychonoff theorem
- Tychonoff theorem for locales
- van Kampen theorem for toposes
- virtual representation
- walking structure
- weighted colimit
- well-ordering theorem
- why (infinity,1)-categories?
- Wick rotation
- Yoneda lemma
- Zariski site
- étale cohomology
- étale topos