div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220306015acf3cfd7f8b9a56098ccbf1html5page1jpg target=_blank img data-url=documentmath-d-birkhoff-155-this-would-mean-that-only-a-finite-number-of-the-periodic-motionshtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: mathharvardedumathharvardeduarchive118r_spring_05docsbirkhoffpdf · G D Birkhoff 155 This would mean that only a finite number of the periodic motions miffht exist for any loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsinreader039viewer20220306015acf3cfd7f8b9a56098ccbf1html5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220306015acf3cfd7f8b9a56098ccbf1html5page2jpg target=_blank img data-url=documentmath-d-birkhoff-155-this-would-mean-that-only-a-finite-number-of-the-periodic-motionshtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: mathharvardedumathharvardeduarchive118r_spring_05docsbirkhoffpdf · G D Birkhoff 155 This would mean that only a finite number of the periodic motions miffht exist for any loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsinreader039viewer20220306015acf3cfd7f8b9a56098ccbf1html5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220306015acf3cfd7f8b9a56098ccbf1html5page3jpg target=_blank img data-url=documentmath-d-birkhoff-155-this-would-mean-that-only-a-finite-number-of-the-periodic-motionshtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3:...