degenerate quadric

The non‐degenerate quadrics are the ellipsoid, the hyperboloid of one sheet, the hyperboloid of two sheets, the elliptic paraboloid, and the hyperbolic paraboloid.

• sporadic group
• spread
• spring
• spring constant
• spurious correlation
• square
• square
• square-integrable
• square matrix
• square number
• square root
• squaring the circle
• squeeze theorem
• SSA
• SSS
• stabilizer
• stable equilibrium
• stable numerical analysis
• stadium paradox
• stagnation point
• standard basis
• standard deviation
• standard error
• standard form
• standard form