退化二次曲面的英文

• degenerate quadric
• improper quadric

• 退化    become vestigial; degenerate ...
• 二次    secondary; quadratic
• 曲面    hook face; curve; curved sur ...
• 退化二次曲线    degenerate conic; improper conic
• 非退化二次曲线    nondegenerate conic
• 超二次曲面    hyperquadric
• 二次曲面    conicoid; quadaratic surface; quadratic surface; quadric surface; second degree surface
• 二次曲面把    bundle of quadic; bundle of quadrics
• 二次曲面列    range of quadrics
• 二次曲面心    centre of quadric
• 真二次曲面    proper quadric surface
• 退化二次型    degenerate quadratic forms; degenerated quadratic form
• 二次曲面的轴    axis of a quadric
• 二次曲面模型    model of a quadric
• 二维二次曲面    two dimensional quadric
• 共焦二次曲面    confocal quadrics; confocal quardrics
• 回转二次曲面    quadric of revolution; quafric of revolution
• 绝对二次曲面    absolute quadric
• 科希二次曲面    cauchy'squadric
• 拉伸二次曲面    quadric of stretching; stretching quadric
• 密切二次曲面    osculating quadric
• 奇异二次曲面    singular quadric
• 射影二次曲面    projective quadric
• 伸长二次曲面    elongation quadric
• 同心二次曲面    concentric quadrics