A quest for 5-point condition a la Alexandrov
arXiv:1411.5329 · doi:10.1090/spmj/1490
Abstract
Here I give a description of Alexandrov 4-point comparison via quadratic forms and then propose a natural 5-point condition which might have some future. Consider this note as a letter from me --- do not take it seriously.
2 pages, 2 figures