Open AccessVector Fields on the n -Sphere
Author(s) -
Norman Steenrod,
J. H. C. Whitehead
Publication year - 1951
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.37.1.58
Subject(s) - passerine , ecological niche , niche , biology , ecology , evolutionary biology , adaptive radiation , geography , phylogenetics , gene , genetics , habitat