Definition:Equiangular Spiral/Mistake

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Source Work

2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.):

equiangular spiral


Mistake

The equation can be written $r = k \theta + b$


Correction

This should read:

The equation can be written $\ln r = k \theta + b$


In the $6$th edition, the expression has been corrected to:

$r = a e^{k \theta}$

which is an equivalent form.


Sources