(Q21651861)
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Quadric surfaces
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Wikipedia(4 entries)
- cvwiki Иккĕмĕш ретри çий
- ruwiki Поверхность второго порядка
- ukwiki Поверхня другого порядку
- uzwiki Ikkinchi tartibli sirtlar
locus of zeros of a quadratic polynomial in a three-dimensional space (affine or projective, not necessarily real)
