- #1
stanford1463
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Homework Statement
What is the x-simple description of a 4-ball = { ||x|| [tex]\leq[/tex] r }
Homework Equations
It's a 4-ball, so isn't the equation x[tex]^{2}[/tex] + y^2 +z^2 +w^2 ?
The Attempt at a Solution
For my limits, I got x is between [tex]\pm[/tex] [tex]\sqrt{1-z^2}[/tex] and y is between -1 and 1, and z is between [tex]\pm[/tex] [tex]\sqrt{1-x^2-y^2}[/tex], and w is between [tex]\pm[/tex] [tex]\sqrt{1-x^2-y^2-z^2}[/tex] Is this right? Thanks!