TopologyVolume 30, Issue 4, 1991, Pages 541-550The scorpions: examples in stable non collapsibility and in geometric category theoryAuthor links open overlay panelJavier Bracho, Luis MontejanoShow moreShareCitehttps://doi.org/10.1016/0040-9383(91)90038-6Get rights and contentUnder an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1991 Published by Elsevier Ltd.