When is it acceptable in a rigorous mathematical proof to cite a result from folklore without supplying your own demonstration of that truth? For example, ''n choose m' is always an integer
Mathematical Thoughts: Group Theory in SageMath by Khyati Sharma, SNU, Greater Noida
Theorem Proving in Mathematics
CS2214, Fall 2020: Discrete Structures for Computing, Marc Moreno-Maza
zun maths
What's a mathematical statement that you can prove using only one picture? - Quora
Mathematical proof - Wikipedia
Is it true that scientific theories can never be proven, only disproven? - Quora
2 + 2 = 5 - Wikipedia
Books: John Conway