24

Answers
votes newest views recent
25
Can the Riemann hypothesis be undecidable?
22
What is a colimit, really?
17
Montague’s Reflection Principle and Compactness Theorem
13
“Philosophical” meaning of the Yoneda Lemma
11
Why hasn’t mereology suceeded as an alternative to set theory?
10
Surreal Numbers and Set Theory
10
Geometric Interpretation of Trace
9
Arithmetic fixed point theorem
8
When a formal power series is a rational function in disguise
5
Why should algebraic objects have naturally associated topological spaces? (Formerly: What is a topological space?)
5
Tarski’s Theorem and Gödel’s Second Incompleteness Theorem
4
existence of a field that has a non surjective ring homomorphism
4
Are all the theorems true?
4
Is there a finitely complete category with terminal object but NO subobject classifier?
4
What is a complex inner product space “really”?
2
Union of a object (a set) in the Elementary Theory of the Category of Sets
2
Can we recognize when a category is equivalent to the category of models of a first order theory?
2
Hat Problem/Hamming Codes
2
Confusion over a point in basic category theory
2
wellfounded sets and predecessors
2
Proof without words for surface area of a sphere
1
Compact Hausdorff and C^*-algebra “objects” in a category.
1
What is information-theoretic lower bound?
1
Why is the output of an LTI system the convolution of the input funtion and the impulse response?