Exotic finite functorial semi-norms on singular homology
arXiv:1605.04093 · doi:10.1017/S0017089518000216
Abstract
Functorial semi-norms on singular homology give refined "size" information on singular homology classes. A fundamental example is the l^1-semi-norm. We show that there exist finite functorial semi-norms on singular homology that are exotic in the sense that they are not carried by the l^1-semi-norm.
8 pages