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FORMS 189 If the u- and v-parameter curves on a patch are themselves conjugate families loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsusreader033viewer2022061611604d4f4cb1744b71a8363378html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=lipschutz-m-schaums-outline-of-differential-geometry-chap-91-first-and-secondhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: Lipschutz M Schaums outline of differential geometry · CHAP 91 FIRST AND SECOND FUNDAMENTAL FORMS 189 If the u- and v-parameter curves on a patch are themselves conjugate families loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsusreader033viewer2022061611604d4f4cb1744b71a8363378html5thumbnails3jpg 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AND SECOND FUNDAMENTAL FORMS 189 If the u- and v-parameter curves on a patch are themselves conjugate families loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentsusreader033viewer2022061611604d4f4cb1744b71a8363378html5thumbnails5jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=6Page 6button div class=ts-imageimg data-url=lipschutz-m-schaums-outline-of-differential-geometry-chap-91-first-and-secondhtmlpage=6 data-page=6 class=ts-thumb lazyload alt=Page 6: Lipschutz M Schaums outline of differential geometry · CHAP 91 FIRST AND SECOND FUNDAMENTAL FORMS 189 If the u- and v-parameter curves on a patch are themselves conjugate families loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC 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