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 Yearling
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Apr
25
revised Geometrical Interpretation of Tensors (intuition)
Improved punctuation
Apr
24
revised Geometrical Interpretation of Tensors (intuition)
better explained 1-forms
Apr
23
answered Geometrical Interpretation of Tensors (intuition)
Mar
29
comment Category theory coproduct beginner question
User87690 if you consider OP question worthy of your (precious?) time to the extent that you answer it, why don't you upvote the question? Also considering that this is the OP's first question here.
Mar
29
answered Category theory coproduct beginner question
Mar
29
comment Motivation behind the definition of equivalence of categories.
Your textbook has to resort to "equality of isomorphism classes of functors" to justify equivalence of categories to a beginner? Wow! Good luck with the rest of the book. If your purpose is to study category theory, I suggest you get a proper introductory textbook on CT. Awodey, or "the joy of cats" (free online) come to mind. MacLane's CWM is also excellent of course.
Mar
23
comment The monoid of integers is not free
@Craig If you like and accept this answer, why don't you upvote it?
Mar
23
comment The monoid of integers is not free
@Craig Yes you should definitely get your CT knowledge from a good textbook. The "Joy of cats" is excellent and freely available online. Yesterday I found : math.jhu.edu/~eriehl/context.pdf which seems well done.
Jan
26
comment Definition of the Diagonal functor
Thank you @JeremyRickard and Najib for the enlightening discussion
Jan
26
accepted Definition of the Diagonal functor
Jan
24
asked Definition of the Diagonal functor
Jan
15
revised “Minimal upper bounds” in a categorical setting
Added last paragraph
Jan
15
answered “Minimal upper bounds” in a categorical setting
Jan
13
comment What is the geometric meaning of representability?
Is there an accepted or acceptable name for the functor in your last example?
Jan
10
comment codiagonal functor and faithfullness
@GiorgioMossa very good explanation and notation. I suggest you do not erase or modify what you have written. Perhaps you might add some type theory notation for those more familiar with it.
Jan
10
revised Counterexample for commutative diagram of epimorphism.
edited small typos
Jan
10
revised Counterexample for commutative diagram of epimorphism.
improved one equation
Jan
10
revised Counterexample for commutative diagram of epimorphism.
fixed small typos
Jan
10
answered Counterexample for commutative diagram of epimorphism.
Nov
17
awarded  Yearling