172 reputation
6
bio website github.com/spraff
location London, United Kingdom
age 94
visits member for 2 years, 9 months
seen Oct 7 at 22:17


Jul
30
comment What fraction of sunlight could we deliberately block out with an occulter?
Hagen is right, overall the shadow is equal and opposite to the light hitting the shield.
Jul
30
accepted What fraction of sunlight could we deliberately block out with an occulter?
Jul
30
asked What fraction of sunlight could we deliberately block out with an occulter?
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?