| Q4596935 |
2-category |
|
|
Strict 2-category |
| Q1216464 |
Abelian |
|
|
|
| Q318737 |
Abelian category |
|
|
Abelian category |
| Q1084766 |
Abstract nonsense |
|
|
|
| Q555097 |
Accessible |
|
|
|
| Q404330 |
Additive |
|
|
|
| Q357823 |
Adjunct |
|
|
Adjunct |
| Q1219045 |
Affine |
|
|
|
| Q382698 |
Affine space |
|
|
Affine space |
| Q3968 |
Algebra |
|
Algebra |
Algebra |
| Q298187 |
Apex |
|
|
|
| Q782566 |
Automorphism |
|
|
Automorphism |
| Q60790315 |
Automorphism group |
|
|
Transformation groups |
| Q180907 |
Bijection |
Bijective function |
|
One-to-one correspondence |
| Q875399 |
Boundary |
|
|
|
| Q4049983 |
Cardinality |
|
|
|
| Q1725874 |
Cartesian closed category |
Cartesian closed category |
Cartesian closed |
Locally cartesian closed category |
| Q5051844 |
Category of elements |
|
Category of elements |
Category of elements |
| Q179208 |
Cayley's theorem |
|
|
|
| Q5062222 |
Center |
|
|
Drinfeld center |
| Q5072826 |
Chaotic |
|
|
|
| Q17099363 |
Classifying space |
|
|
|
| Q320357 |
Closed |
|
|
|
| Q4720939 |
Closure |
|
|
|
| Q10564851 |
Closure operator |
Closure operator |
|
Closure operator |
| Q3062935 |
Coalgebra |
|
|
|
| Q4370335 |
Cocomplete |
Finitely complete category |
|
Finitely complete category |
| Q199006 |
Codomain |
|
|
|
| Q5140810 |
Coequalizer |
Co-equaliser |
Coequalizer |
Coequalizer |
| Q4227156 |
Coinduction |
|
|
Coinduction |
| Q2156511 |
Cokernel |
Cokernel |
|
Cokernel |
| Q1780005 |
Comma category |
Comma category |
Comma category |
Comma category |
| Q522216 |
Commutator subgroup |
|
|
Derived series |
| Q165474 |
Commute |
|
|
|
| Q848569 |
Complete |
|
Complete |
Complete topological vector space |
| Q2362924 |
Complete lattice |
|
|
Complete lattice |
| Q5156688 |
Component |
|
Component |
|
| Q1575634 |
Concrete category |
|
|
Concrete category |
| Q1850712 |
Cone |
Cone |
Cone |
|
| Q5161408 |
Connected |
|
|
Connected category |
| Q1491995 |
Connected component |
|
|
Locally path-connected space |
| Q692689 |
Coproduct |
Coproduct |
Sum |
Coproduct |
| Q5154570 |
Coskeleton |
|
|
|
| Q344552 |
Covariant |
|
|
|
| Q331481 |
Cover |
Open cover |
|
Open cover |
| Q5183420 |
Create |
|
|
|
| Q1144925 |
Currying |
|
|
Currying |
| Q225014 |
Cycle |
|
|
Cycle |
| Q483525 |
Dense |
|
|
|
| Q48996306 |
Density theorem |
|
|
|
| Q843237 |
Diagram |
Diagram |
Diagram |
|
| Q906015 |
Direct limit |
|
Direct limit |
Inductive limit |
| Q378637 |
Discrete dynamical system |
|
|
|
| Q338707 |
Disjoint |
|
|
|
| Q192439 |
Domain |
|
|
|
| Q752487 |
Double dual |
|
|
Dual vector space |
| Q2361385 |
Dual |
Duality |
Dual |
|
| Q1296024 |
Effective |
|
|
|
| Q1340800 |
Endomorphism |
|
|
Endomorphism |
| Q1347208 |
Epimorphism |
|
Epimorphism |
Strong epimorphism |
| Q1224487 |
Equalizer |
Equaliser |
Equalizer |
|
| Q1082992 |
Equivalence of categories |
Equivalence of categories |
Equivalence |
Equivalence of categories |
| Q130998 |
Equivalence relation |
Equivalence relation |
|
Equivalence relation |
| Q235935 |
Equivalent |
|
Equivalent |
Equivalence |
| Q16033993 |
Exact |
|
|
|
| Q1184041 |
Faithful |
|
Faithful |
|
| Q5446381 |
Fiber space |
|
|
|
| Q244772 |
Filtered |
|
|
|
| Q5450158 |
Finest |
|
|
|
| Q5450381 |
Finitary |
|
|
|
| Q11516722 |
Finite |
|
Finite |
|
| Q2646117 |
Forgetful functor |
Forgetful functor |
|
Forgetful functor |
| Q81881 |
Fork |
|
Fork |
Fork |
| Q184410 |
Four color theorem |
|
|
Four-colour theorem |
| Q231766 |
Free |
|
|
|
| Q1454111 |
Free abelian group |
|
|
Free abelian group |
| Q431078 |
Free group |
|
|
Free group |
| Q237107 |
Full |
|
Full |
|
| Q864475 |
Functor |
Covariant functor |
Functor |
Multifunctor |
| Q662830 |
Fundamental groupoid |
|
|
Fundamental groupoid |
| Q766522 |
Fundamental theorem of Galois theory |
|
|
|
| Q2020004 |
Galois extension |
|
|
Galois extension |
| Q730384 |
Galois group |
|
|
Galois group |
| Q1467124 |
Geometric realization |
|
|
Simplicial set |
| Q3041173 |
Group extension |
|
|
Group extension |
| Q1196038 |
Groupoid |
|
|
Groupoid |
| Q202906 |
Homeomorphism |
Homeomorphic |
|
Homeomorphism |
| Q1144780 |
Homology |
|
|
Exact triangle |
| Q215111 |
Homomorphism |
|
|
Homomorphism |
| Q14775269 |
Homotopy category |
|
|
Homotopy category |
| Q746083 |
Homotopy equivalence |
|
|
Null homotopy |
| Q1948412 |
Identity morphism |
Hom-set |
Arrow |
Morphism |
| Q860530 |
Image |
|
|
|
| Q178377 |
Induction |
|
|
|
| Q378408 |
Initial |
|
Initial |
|
| Q862761 |
Interior |
|
|
Interior point |
| Q17141489 |
Intersection |
|
|
Intersection |
| Q2634828 |
Inverse limit |
|
|
Projective limit |
| Q189112 |
Isomorphic |
|
Isomorphic |
Isomorphism |
| Q6086107 |
Isomorphism of categories |
|
|
|
| Q506041 |
Jacobian matrix |
|
|
|
| Q2920416 |
Kernel |
|
|
|
| Q2844249 |
Kernel pair |
Kernel pair |
|
Regular logic |
| Q1773982 |
Kleisli category |
|
|
Kleisli triple |
| Q3485002 |
Left |
|
|
|
| Q133105 |
Leg |
|
|
|
| Q1322614 |
Limit |
Limit |
Limit |
Continuous functor |
| Q251307 |
Localization |
|
|
Localization |
| Q4672496 |
Locally presentable category |
|
|
Locally presentable category |
| Q13635346 |
Locally small |
Locally small |
Locally small |
Tensor product of functors |
| Q1503423 |
Loop |
|
|
Quasigroup |
| Q1630568 |
Monad |
Monad |
|
Monadic functor |
| Q6897858 |
Monadic |
|
|
|
| Q2785361 |
Monoid |
Monoid |
|
Comonoid |
| Q1945067 |
Monomorphism |
|
Monomorphism |
Regular monomorphism |
| Q40276 |
Multiplication |
|
|
Multiplication |
| Q145825 |
Nadir |
|
|
|
| Q1442189 |
Natural isomorphism |
Natural transformation |
Natural isomorphism |
Unnatural isomorphism |
| Q719395 |
Object |
|
Object |
Small category |
| Q7098616 |
Opposite category |
Opposite category |
|
Opposite category |
| Q3117899 |
Opposite group |
|
|
|
| Q230664 |
Orbit |
|
|
|
| Q311627 |
P-adic integer |
|
|
P-adic number |
| Q1756942 |
Partial function |
Partial function |
Partial function |
Partial function |
| Q1366002 |
Path |
Path |
|
|
| Q9248237 |
Pointwise |
|
|
Pointwise order |
| Q33456 |
Power |
Exponentiation |
Power |
|
| Q7241053 |
Preserve |
Preserve |
|
|
| Q7241077 |
Presheaf |
|
Presheaf |
Yoneda extension |
| Q919107 |
Product |
|
Product |
|
| Q1397439 |
Pullback |
Pullback square |
Pullback square |
|
| Q1633079 |
Pushout |
Pushout |
Pushout |
|
| Q120429 |
Reflect |
Reflect |
|
Reflection |
| Q6101219 |
Reflective subcategory |
|
|
Reflective subcategory |
| Q426221 |
Reflector |
|
Reflection |
|
| Q130901 |
Relation |
|
|
Functional relation |
| Q2905654 |
Representation |
Representation |
Representation |
|
| Q357858 |
Right adjoint |
Unit of adjunction |
Right adjoint |
Right adjoint |
| Q320245 |
Right derived functor |
|
|
Derived functor |
| Q7451799 |
Separating set |
|
|
|
| Q17000267 |
Separator |
Generator |
|
|
| Q2119470 |
Sierpinski space |
|
Sierpinski space |
Sierpinski space |
| Q7881 |
Skeletal |
|
|
Skeleton |
| Q2291918 |
Skeleton |
Skeleton |
|
|
| Q420725 |
Small |
|
Small |
|
| Q7432 |
Species |
|
|
Species |
| Q288465 |
Stabilizer |
|
|
Transitive action |
| Q7631142 |
Subfunctor |
|
|
Subfunctor |
| Q2547089 |
Subobject |
Subobject |
Quotient object |
Subobject |
| Q207326 |
Summit |
|
|
|
| Q17103860 |
Symmetric monoidal category |
|
|
Symmetric monoidal category |
| Q188524 |
Tensor |
|
|
Tensor |
| Q210481 |
Terminal |
|
Terminal |
|
| Q25098802 |
Topological monoid |
|
|
Topological monoid |
| Q636889 |
Total derivative |
|
|
Total derivative |
| Q223683 |
Transpose |
|
Transpose |
Transpose matrix |
| Q1080547 |
Truncation |
|
|
|
| Q1987578 |
Unit interval |
|
|
|
| Q1945014 |
Unit object |
|
|
Unitor |
| Q161172 |
Unital ring |
|
|
Ring object |
| Q386320 |
Universal element |
Representable functor |
|
Universal element |
| Q1417809 |
Universal property |
Universal property |
Universal |
Universal construction |
| Q17104639 |
Weak equivalence |
|
|
Weak homotopy equivalence |
| Q204 |
Zero map |
|
|
Zero function |
| Q529752 |
Zero object |
Terminal object |
|
Zero object |
| Q7595945 |
|
2-sheaf |
|
Artin stack |
| Q4669982 |
|
Abstraction |
|
|
| Q345680 |
|
Antecedent |
|
Antecedent |
| Q17123932 |
|
Antisymmetric |
|
|
| Q177251 |
|
Associative Law |
Associativity |
Associativity |
| Q1896657 |
|
Atom |
|
Urelement |
| Q2328174 |
|
Atomic formula |
|
|
| Q179692 |
|
Axiom of choice |
Axiom of choice |
Axiom of choice |
| Q740424 |
|
Axiom of extensionality |
|
Axiom of extensionality |
| Q920450 |
|
Axiom of infinity |
|
Axiom of infinity |
| Q920796 |
|
Axiom of pairs |
|
Axiom of pairing |
| Q780487 |
|
Axiom of separation |
|
Axiom of separation |
| Q187456 |
|
Bar |
|
|
| Q204355 |
|
Biconditional |
|
Biconditional |
| Q734272 |
|
Bivalent |
|
|
| Q173183 |
|
Boolean algebra |
|
Boolean algebra |
| Q595364 |
|
Bounded lattice |
|
|
| Q1047307 |
|
Bundle |
|
|
| Q230797 |
|
Chain |
|
|
| Q1934165 |
|
Change of variables |
|
|
| Q1062934 |
|
Character |
|
|
| Q361254 |
|
Characteristic function |
Characteristic function |
Characteristic function |
| Q2513496 |
|
Choice function |
|
Choice function |
| Q5127787 |
|
Clas |
Clas |
|
| Q236975 |
|
Classical logic |
|
Classical logic |
| Q1744628 |
|
Classifier |
|
|
| Q10894825 |
|
Closure algebra |
|
Closure algebra |
| Q1777803 |
|
Co-unit |
|
Sweedler notation |
| Q1283623 |
|
Cofinality |
|
Cofinality |
| Q621542 |
|
Commutative diagram |
|
Diagram chasing |
| Q381892 |
|
Compact space |
|
Compactum |
| Q296074 |
|
Compatible |
|
|
| Q5156434 |
|
Complemented lattice |
|
Orthomodular lattice |
| Q5156470 |
|
Complete Heyting algebra |
|
Frames and locales |
| Q11567 |
|
Complex number |
|
Real part |
| Q244761 |
|
Composition of functions |
Composition |
|
| Q16769650 |
|
Comprehension |
|
|
| Q226931 |
|
Conjunction |
|
Conjunction |
| Q5161702 |
|
Connective |
|
Connective |
| Q261155 |
|
Consequent |
|
Consequent |
| Q23808682 |
|
Conservative functor |
|
Conservative functor |
| Q1319773 |
|
Consistent theory |
|
Internal logic |
| Q188248 |
|
Constant |
|
|
| Q1137814 |
|
Constructivism |
|
Constructive mathematics |
| Q5500266 |
|
Continuous morphism |
|
Free monoid |
| Q173300 |
|
De Morgan’s law |
|
De Morgan duality |
| Q1200750 |
|
Description |
|
|
| Q1201068 |
|
Detachment |
|
|
| Q1228851 |
|
Discrete category |
|
Discrete category |
| Q175116 |
|
Discrete topology |
Discrete topology |
|
| Q215382 |
|
Disjoint set |
|
|
| Q5282259 |
|
Disjoint union |
Disjoint union |
|
| Q1651704 |
|
Disjunction |
|
Disjunction |
| Q2363730 |
|
Distributive lattice |
|
Distributive lattice |
| Q5300067 |
|
Double negation |
|
Law of double negation |
| Q5310265 |
|
Duality Principle |
Principle of duality |
|
| Q226183 |
|
Empty set |
|
Empty subset |
| Q842346 |
|
Equality |
|
|
| Q11345 |
|
Equation |
|
Equation |
| Q852705 |
|
Evaluation function |
|
|
| Q381725 |
|
Exact functor |
|
Exact functor |
| Q468422 |
|
Excluded Middle |
|
Excluded middle |
| Q773483 |
|
Existential quantifier |
|
Existential quantifier |
| Q295785 |
|
Extension |
|
Extension |
| Q965432 |
|
Extensional relation |
|
Extensionality |
| Q5421978 |
|
Extent |
|
|
| Q1064276 |
|
Faithful functor |
|
Full functor |
| Q2890850 |
|
False generalisation |
|
|
| Q14240380 |
|
Fibre |
|
|
| Q4055684 |
|
First-order sentence |
|
Predicate logic |
| Q217608 |
|
Fixed point |
|
Fixpoint |
| Q3064613 |
|
Flabby sheaf |
|
Soft sheaf |
| Q976981 |
|
Formula |
|
Formula |
| Q227744 |
|
Foundation |
|
|
| Q354717 |
|
Fragment |
|
Fragment |
| Q294490 |
|
Frame |
|
Frame (disambiguation)) |
| Q3502887 |
|
Free logic |
|
|
| Q935944 |
|
Free variable |
|
|
| Q541563 |
|
Full subcategory |
Subcategory |
Subcategory |
| Q11348 |
|
Function |
|
Empty function |
| Q242028 |
|
Functional abstraction |
|
Lambda-calculus |
| Q2007878 |
|
Functor category |
Functor category |
Functor category |
| Q643669 |
|
Generate |
|
|
| Q2143621 |
|
Geometric morphism |
|
Topos theory |
| Q2520842 |
|
Germ |
|
|
| Q5570834 |
|
Global element |
|
Global element |
| Q83478 |
|
Group |
|
|
| Q5737878 |
|
Hereditary set |
|
Pure set |
| Q1644136 |
|
Higher-order logic |
|
Higher-order logic |
| Q5887297 |
|
Hom-functor |
|
Internal hom |
| Q321119 |
|
Identity function |
|
Identity function |
| Q1215266 |
|
Implication |
|
Implication |
| Q3149511 |
|
Impredicative definition |
|
Predicative mathematics |
| Q1663694 |
|
Inclusion function |
|
Inclusion function |
| Q6033604 |
|
Inhabited |
|
|
| Q182003 |
|
Injective function |
|
|
| Q1923256 |
|
Intension |
|
|
| Q5361594 |
|
Intermediate logic |
|
|
| Q10879018 |
|
Intuitionism |
|
Intuitionistic mathematics |
| Q176786 |
|
Intuitionistic logic |
|
Intuitionistic logic |
| Q860623 |
|
Inverse image |
|
Preimage |
| Q1248241 |
|
Inverse relation |
|
|
| Q338057 |
|
Invertible |
|
|
| Q1723418 |
|
Kan extension |
|
Kan extension |
| Q192826 |
|
Kronecker delta |
|
Kronecker delta |
| Q2754968 |
|
Lattice |
|
Lattice (disambiguation)) |
| Q1196892 |
|
Least element |
Least element |
|
| Q17502105 |
|
Least upper bound |
Greatest lower bound |
|
| Q44649 |
|
Left ideal |
|
|
| Q858223 |
|
Limit point |
|
Limit point |
| Q1052761 |
|
Local homeomorphism |
|
Local homeomorphism |
| Q1762213 |
|
Locally constant function |
|
Locally constant function |
| Q220433 |
|
Logically equivalent |
|
Logical equivalence |
| Q845691 |
|
Logicism |
|
|
| Q834585 |
|
Lower semilattice |
|
Semilattice |
| Q6269005 |
|
Meet |
|
|
| Q18629142 |
|
Member |
|
|
| Q193983 |
|
Metalanguage |
|
Metalanguage |
| Q1475294 |
|
Minimal element |
|
Maximal element |
| Q845060 |
|
Minimum |
|
Extremum |
| Q210841 |
|
Modal logic |
|
Modal logic |
| Q638442 |
|
Modal operator |
|
|
| Q7449424 |
|
Monoid action |
|
|
| Q208237 |
|
Monoid homomorphism |
|
Submonoid |
| Q194404 |
|
Monotone function |
|
Monotone function |
| Q15947602 |
|
Natural map |
|
|
| Q21199 |
|
Natural number |
|
Natural number |
| Q6980740 |
|
Natural numbers object |
|
Natural numbers object |
| Q190558 |
|
Negation |
|
Negation |
| Q2478475 |
|
Neighbourhood |
|
|
| Q4347052 |
|
Object language |
|
|
| Q529641 |
|
One-one |
|
|
| Q229102 |
|
Onto |
|
Surjection |
| Q830486 |
|
Open formula |
|
|
| Q213363 |
|
Open set |
|
|
| Q24175351 |
|
Order relation |
|
Order theory |
| Q191290 |
|
Ordered pair |
|
Ordered pair |
| Q191780 |
|
Ordinal |
|
Ordinal number |
| Q842755 |
|
Peano Postulate |
|
Peano arithmetic |
| Q44946 |
|
Point |
|
|
| Q474715 |
|
Poset |
|
Strict order |
| Q4391173 |
|
Power object |
Exponential |
Power object |
| Q205170 |
|
Power set |
Power set |
Power set |
| Q1077811 |
|
Powerset axiom |
|
|
| Q1425985 |
|
Preorder |
|
Quasiorder |
| Q7242162 |
|
Pretopology |
|
Pretopological space |
| Q1570472 |
|
Primitive recursion |
|
|
| Q13443840 |
|
Product category |
Product category |
Product category |
| Q173740 |
|
Product set |
|
Cartesian square |
| Q13415428 |
|
Projection |
Projection |
Coordinate projection |
| Q18345290 |
|
Pseudo-complement |
|
|
| Q1806121 |
|
Range |
|
|
| Q12916 |
|
Real number |
|
Real number |
| Q7301281 |
|
Realisation |
|
|
| Q2136742 |
|
Reflexive |
|
|
| Q470981 |
|
Regularity axiom |
|
Axiom of foundation |
| Q1617044 |
|
Relative pseudo-complement |
|
Heyting algebra |
| Q1361825 |
|
Replacement axiom |
|
Axiom of replacement |
| Q1308999 |
|
Restriction |
|
|
| Q9588 |
|
Richard Nixon |
|
|
| Q1068763 |
|
Rule of inference |
|
|
| Q33401 |
|
Russell set |
|
Russell's paradox |
| Q421639 |
|
Satisfaction |
|
|
| Q17103180 |
|
Section |
Section |
Split monomorphism |
| Q394320 |
|
Selection |
|
|
| Q348486 |
|
Sentence |
|
Sentence |
| Q2271572 |
|
Separation principle |
|
|
| Q843632 |
|
Sequent |
|
Sequent |
| Q2518298 |
|
Set |
Set |
|
| Q379825 |
|
Set membership |
|
Membership relation |
| Q12482 |
|
Set theory |
|
Set theory |
| Q5572389 |
|
Sheafification |
|
Sheafification |
| Q7511782 |
|
Sieve |
|
|
| Q1165112 |
|
Singleton |
|
|
| Q1062242 |
|
Site |
|
Étale site |
| Q246475 |
|
Sober |
|
|
| Q347599 |
|
Sort |
|
|
| Q224772 |
|
Source |
|
Source |
| Q17103642 |
|
Stalk |
|
|
| Q6035663 |
|
Standard model |
|
|
| Q1724688 |
|
Strict |
|
|
| Q7631737 |
|
Subobject classifier |
|
Subobject classifier |
| Q177646 |
|
Subset |
|
Subset |
| Q40754 |
|
Subtraction |
|
Subtraction |
| Q7632653 |
|
Successor function |
|
|
| Q875267 |
|
Sufficient |
|
|
| Q1136376 |
|
Support |
|
Support of a function |
| Q12485 |
|
Symmetric |
|
Symmetry |
| Q230479 |
|
Target |
|
Target |
| Q13560073 |
|
Tautology |
|
Tautology |
| Q1318370 |
|
Term |
|
|
| Q17988630 |
|
Theory |
|
|
| Q42989 |
|
Topology |
|
Topology |
| Q1501387 |
|
Transitive closure |
|
Transitive closure |
| Q64861 |
|
Transitive relation |
|
Transitive relation |
| Q671944 |
|
Transitive set |
|
Transitive set |
| Q272735 |
|
Tree |
|
|
| Q913874 |
|
Truth-function |
|
|
| Q185359 |
|
Union of sets |
|
|
| Q784645 |
|
Universal instantiation |
|
|
| Q126695 |
|
Universal quantifier |
|
Universal quantifier |
| Q13222579 |
|
Upper bound |
Upper bound |
Upper bound |
| Q365832 |
|
Valuation |
|
Valuation |
| Q852662 |
|
Value assignment |
|
|
| Q338021 |
|
Well-founded relation |
|
Well-founded relation |
| Q320577 |
|
Yoneda lemma |
Yoneda embedding |
Yoneda lemma |
| Q136080 |
|
ZF |
|
|
| Q4724020 |
|
|
Algebraic theory |
Algebraic theory |
| Q1086961 |
|
|
Bilinear map |
Bilinear map |
| Q444936 |
|
|
Canonical |
Canonical |
| Q1208187 |
|
|
Diagonal functor |
Diagonal functor |
| Q5358816 |
|
|
Element |
|
| Q267903 |
|
|
Epic |
|
| Q256355 |
|
|
Equivariant map |
Intertwiner |
| Q1379672 |
|
|
Evaluation |
|
| Q5500272 |
|
|
Free functor |
Free object |
| Q609647 |
|
|
Identity |
|
| Q224353 |
|
|
Inverse |
Inverse |
| Q1555242 |
|
|
Left regular representation |
Regular representation |
| Q370502 |
|
|
Map |
|
| Q6899873 |
|
|
Monic |
|
| Q161519 |
|
|
Permutation |
Permutation |
| Q408620 |
|
|
Regular |
Regularity |
| Q1155772 |
|
|
Scheme |
|
| Q133250 |
|
|
Sequence |
Sequence |
| Q207961 |
|
|
Shape |
Shape |
| Q2033899 |
|
|
Stone-Cech compactification |
Stone-Čech compactification |
| Q1163016 |
|
|
Tensor product |
Tensor product of vector spaces |
| Q356743 |
|
|
Topo |
|
| Q369377 |
|
|
Total order |
Total order |
| Q1056428 |
|
|
Type |
Type theory |
| Q295346 |
|
|
Vertex |
Vertex |
| Q595298 |
Étale space |
Pre-sheaf |
|
Étale space |