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Dec
3
revised Limit of this indeterminate form.
nominator->numerator
Dec
3
revised For $z =\frac{ xy}{x+y}$, why is $z < x$ and $z < y$ for all values of $x > 0$ and $y > 0$?
nominator->numerator
Dec
3
revised How to simplify $\frac{4 + 2\sqrt6}{\sqrt{5 + 2\sqrt{6}}}$?
nominator->numerator
Dec
3
suggested approved edit on Limit of this indeterminate form.
Dec
3
suggested approved edit on For $z =\frac{ xy}{x+y}$, why is $z < x$ and $z < y$ for all values of $x > 0$ and $y > 0$?
Dec
3
suggested approved edit on How to simplify $\frac{4 + 2\sqrt6}{\sqrt{5 + 2\sqrt{6}}}$?
Dec
3
comment How to simplify $\frac{4 + 2\sqrt6}{\sqrt{5 + 2\sqrt{6}}}$?
Isn't this how you show 5 equals 4?
Aug
16
comment Is addition more fundamental than subtraction?
@Lee: and a metric is positive by definition.
Aug
15
awarded  Popular Question
Aug
15
comment Is addition more fundamental than subtraction?
@user1729 in my defense, I touched that aspect already in this comment
Aug
15
comment Is addition more fundamental than subtraction?
A subtraction like this does not conform to the natural definition subtraction has. A metric is positive definite, subtraction is not.
Aug
15
awarded  Nice Question
Aug
14
awarded  Yearling
Aug
14
comment Is addition more fundamental than subtraction?
@AustinMohr: I'll keep that in mind. Sorry about that.
Aug
14
comment Is addition more fundamental than subtraction?
@Drise: completely equivalent after the isomorphic transformation. So in Math speak: completely equivalent.
Aug
14
comment Is addition more fundamental than subtraction?
Reversing the two concepts just leaves you with two isomorphic concepts that does not answer the question.
Aug
14
asked Is addition more fundamental than subtraction?
Jul
31
comment What's the meaning of the unit bivector i?
@draks that is not geometric algebra. That's Dirac algebra which only makes sense in Dirac theory. Geometric algebra promises (I'm still learning) to be applicable/useful everywhere, not just in the case of $\gamma$s. And an index $i$ is nothing evil.
Jul
31
awarded  Critic
Jul
31
comment What's the meaning of the unit bivector i?
@celtschk OK. But Hestenes maintains quaternions are just an aspect/transformation/... of the more general geometric algebra (at least in sofar they are used in Physics). I can't deduce any geometric meaning from quaternions either, so although insightful, it doesn't help me much (probably why you made it a comment anyways ;-)).