160 reputation
6
bio website github.com/spraff
location London, United Kingdom
age 94
visits member for 2 years, 5 months
seen Jun 8 at 19:22


Jul
2
awarded  Curious
Jun
8
accepted How fast will a shape grow if it can grow exponentially only at the border, and growth is limited by crowding?
May
31
asked How fast will a shape grow if it can grow exponentially only at the border, and growth is limited by crowding?
May
19
awarded  Tumbleweed
May
12
asked Is there a better approach than DFT for identifying known pitches in a sound sample?
May
12
asked How should I do frequency-dependent normalization of a discrete Fourier transform?
Mar
27
awarded  Editor
Mar
27
revised Pen-and-paper educational games
added 70 characters in body
Mar
27
asked Pen-and-paper educational games
Feb
17
asked What are the parameters for the edge-match-restricting arcs drawn on Penrose tilings?
Feb
5
comment A difficult integral
I've never seen that method before, turning $x=...$ into $dx=...$ what's that called and what's the argument that it's valid?
Feb
4
comment Is it faster to count to the infinite going one by one or two by two?
My maths teacher one told me I was "going nowhere fast." Perhaps this is what he meant...
Jan
31
awarded  Scholar
Jan
31
accepted When are complex conjugates of solutions not also solutions?
Jan
29
comment What are the uses of split-complex numbers?
@MJD you don't have to represent these numbers as matrices. There's not reason the equivalence should still hold as you extend the number system arbitrarily.
Jan
29
asked When are complex conjugates of solutions not also solutions?
Oct
12
asked What are some good games for teaching maths to children?
Feb
28
comment Finding an $D$-dimensional orthonormal change-of-basis matrix given a $D$-$2$ transformed points.
The determinant of the middle matrix is zero.
Feb
28
asked Finding an $D$-dimensional orthonormal change-of-basis matrix given a $D$-$2$ transformed points.
Feb
26
asked Discrete approximations of $\nabla^2{\bf v}$