@article{oai:kitami-it.repo.nii.ac.jp:00006318, author = {礒部, 煕郎}, issue = {1}, journal = {北見工業大学研究報告}, month = {Dec}, note = {application/pdf, Let E be a real vector space,A positive cone in E is a non-void subset P such that 1) P+P⊂P,2)αP⊂P whenever α is a non-negative scalar, 3)α,−α∈P implies α=0, 4)E={x−y: x, y∈P}. If E is an ordered Vector Space, then E^+={x: x∈E, x>_−0} is a positive cone. In this note is discussed the introduction of a positive cone in E and the expansion of a positive cone.}, pages = {155--158}, title = {ベクトル空間のPositive Cone についての一考察}, volume = {4}, year = {1972} }