All Questions
4 questions
8
votes
1
answer
461
views
Existence of at least one compact orbit on the sphere
Good morning,
I've came across this question during my researches. It seems apparently very simple, however I Googled a bit and I couldn't find the answer I was looking for.
The question is as ...
- 277
3
votes
0
answers
141
views
Which is the number of independent components of a flat spin connection in a 4 dimension Weitzenböck spacetime?
A spin connection $A_{ab\mu}=-A_{ba\mu}$ has 24 components. The number of independent components for a flat spin connection can be counted by subtracting the constrains set by the condition of null ...
- 51
38
votes
3
answers
8k
views
The error in Petrovski and Landis' proof of the 16th Hilbert problem
What was the main error in the proof of the second part of the 16th Hilbert problem by Petrovski and Landis?
Please see this related post and also the following post.. For Mathematical development ...
- 356
15
votes
8
answers
4k
views
Are there some original papers or books related to applications of algebraic topology and algebraic geometry in complex dynamic systems
Recently I have much interest in algebraic topology and algebraic geometry. I am a student of the field of complex dynamical systems. According to my knowledge, my friends told me that there are many ...