请问这道圆锥曲线第二问的射影几何背景是什么? 知乎 Template




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anonymous
anonymous
sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


anonymous
anonymous
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anonymous
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anonymous
anonymous
sketch #5138 Monster by Leonie Cooper


Jose Rondon
sketch #2772 Merry Christmas from Victor Montecinos Jose Rondon


anonymous
anonymous
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anonymous
anonymous
sketch #4362 cow


anonymous
anonymous
sketch #4869 Madara by Jean-Benoit Renaud


anonymous
anonymous
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anonymous
anonymous
sketch #1536 Dark Night


anonymous
anonymous
sketch #3732 Michael Jackson by David Obando


anonymous
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sketch #2082 mash


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anonymous
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anonymous
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anonymous
anonymous
sketch #4933 Tobi by Abdelwahab Haik


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sketchmaster
sketch #2460 Zayn Malik of One Direction by sketchmaster


anonymous
anonymous
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tomski请问这道圆锥曲线第二问的射影几何背景是什么? 知乎 coloring