div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader043fdocumentsinreader043viewer20220309215b79e2d97f8b9a331e8ed6dehtml5page1jpg target=_blank img data-url=documenta-crossed-module-a-b-o-is-meant-a-theorem-1-the-categories-of-k-invarianthtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: groupoidsorgukgroupoidsorgukpdffilesbrown-spencer-G-groupoidpdfBy a crossed module A B ò is meant a THEOREM 1 The categories of k-invariant which in this case loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsinreader043viewer20220309215b79e2d97f8b9a331e8ed6dehtml5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader043fdocumentsinreader043viewer20220309215b79e2d97f8b9a331e8ed6dehtml5page2jpg target=_blank img data-url=documenta-crossed-module-a-b-o-is-meant-a-theorem-1-the-categories-of-k-invarianthtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: groupoidsorgukgroupoidsorgukpdffilesbrown-spencer-G-groupoidpdfBy a crossed module A B ò is meant a THEOREM 1 The categories of k-invariant which in this case loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsinreader043viewer20220309215b79e2d97f8b9a331e8ed6dehtml5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader043fdocumentsinreader043viewer20220309215b79e2d97f8b9a331e8ed6dehtml5page3jpg target=_blank img data-url=documenta-crossed-module-a-b-o-is-meant-a-theorem-1-the-categories-of-k-invarianthtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: groupoidsorgukgroupoidsorgukpdffilesbrown-spencer-G-groupoidpdfBy a crossed module A B ò is...