Involuties op rationale krommen ...
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3)7 a, X3 a2-o a2 -3 -~ derhalve a, a12 o.0 a, De vereenvoudigyde gyedaante van de verwantschapsvergrelijk-ing der J2 is nu XI x2 x3 - constante. Heeft 'in een ander g-eval de C3 drie rei~ele buigpunten B en een gefsoleerd punt I dan knunnen wij de beeldrechte / evenwijdig aan de lijn I 13, nemen en het nnlpunt daar waar 'I B2 de beeldreehte snijdt. De verogelijking der drievoudige punten der J2was aox3~+3 alx2 +3a2X-+ a3=o, H-ieraan moeten nu x -= o en x 0 Covoldoen wat slechts graat wanneer ao0 a3 a.0 De vergelijking der J2vereenvoudigyt zich in dit geval tot den vorm XIx2 +x2 x3 +X3 XI ~(Xi +x2 +X3). Is ten slotte de C3 voorzien van een kceerpunt K eneen reiel buigypnnt. B dan kieze men de beeldrechte I evenwijdigaan de lijn K B en het nuipunt in het. neutrale dubbelpunt der involutie. Voor X1 a 2_ moet. nu x3 onbepaald worden, hetgeen vereischt dat a2 - a3 a.0 Orndat verder aan de vercgelijkingy der drievoudige punten x 00 moet voldoen, volg-,t a0 o, en wordt de vergelijkingr der J2 gecondenseerd tot XI x2 +X9_x3 +Kx3x XIo.0 *De drievoudige punaten warden gyevonden nit x2 a d. w. z. dat. twee buigpunten in het keerpunt liggen.
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About this Item
- Title
- Involuties op rationale krommen ...
- Author
- Vreeswijk, Johannes Adrianus, jr.
- Canvas
- Page 27
- Publication
- Utrecht,: Stommdrukkerij "De Industrie" J. van Druten,
- 1905.
- Subject terms
- Involutes (Mathematics)
Technical Details
- Link to this Item
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https://name.umdl.umich.edu/abn7699.0001.001
- Link to this scan
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https://quod.lib.umich.edu/u/umhistmath/abn7699.0001.001/51
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DPLA Rights Statement: No Copyright - United States
Related Links
IIIF
- Manifest
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https://quod.lib.umich.edu/cgi/t/text/api/manifest/umhistmath:abn7699.0001.001
Cite this Item
- Full citation
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"Involuties op rationale krommen ..." In the digital collection University of Michigan Historical Math Collection. https://name.umdl.umich.edu/abn7699.0001.001. University of Michigan Library Digital Collections. Accessed May 1, 2025.