1,146 reputation
412
bio website wildcatsformma.wordpress.com
location Somewhere over the rainbow
age
visits member for 1 year, 6 months
seen 17 hours ago
stats profile views 142

My scientific interests:

  • Mathematics: Category Theory, Algebra, Logic (Model-Theory, ATP), Control Systems
  • Physics: General Relativity, QFT
  • Amateur Astronomer and Astrophotographer
  • Mathematica programming

My Website:WildCats
Premiere Mathematica package for category theory

Visit the newly launched Mathematica.SE!

My non-scientific interests:

  • Skiing, Sailing, Windsurfing
  • Argentine Tango dancer

More or less fluent in (random order):

Italian, English, German, French, Spanish, Dutch and struggling with Russian


May
5
revised How to define topology in terms of subobjects?
edited small typos
May
5
revised Thin categories: up to isomorphism Vs up to equivalance
edited catlab -> ncatlab
May
5
revised Left adjoint in a functor category
corrected grammar
Mar
27
revised Definition of limit in category theory - is $X$ a single object of $J$ or a subset of $J$?
Edited some small typos
Mar
26
revised Distinguishing equality and isomorphism as relations
Edited some small typos
Mar
25
revised Distinguishing equality and isomorphism as relations
Edited some small typos
Mar
8
revised If we have an equivalence relation on a class, is it possible to define what it means for the collection of equivalence “to be a set”?
edited antecedent formula
Mar
6
revised If $C'$ is a subcategory of $C$, why can $\mathrm{Hom}_C(X, Y)$ and $\mathrm{Hom}_{C'}(X, Y)$ be different?
edited subset formula
Feb
17
revised In what sense is the forgetful functor $Ab \to Grp$ forgetful?
edited text
Feb
10
revised Reference request - being rigorous about a common abuse of notation.
edited small typos
Jan
21
revised Fixed points in category theory
Changed mapsto to to
Jan
9
revised Product in a preorder
edited supremum -> infimum
Jan
5
revised Show that the powerset partial order is a cartesian closed category.
edited title
Dec
14
revised Universal arrows' definition
edited text
Dec
13
revised Universal arrows' definition
edited small typos
Dec
11
revised How to characterize categories which their only isomorphisms are identities?
edited title
Dec
7
revised The importance of parallel arrows in a commutative square
added last paragraph
Dec
4
revised Equivalence of categories and subcategories
changed "transforms" to "isomorphisms"
Dec
4
revised Equivalence of categories and subcategories
Edited some small typos
Dec
4
revised Equivalence of categories and subcategories
added paragraph