El'endia Starman
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 May24 comment Subtract gravity from 3D object in different orientations @Steven: Huh, interesting. I didn't do any testing myself, I just found this matrix and did the relevant multiplication...so I suppose it's possible they had a typo or something. May24 comment Probability that 5 different faces come up twice each if 6 side die is rolled ten times? @meiryo: en.wikipedia.org/wiki/… May24 revised Trying to plot these points in a polar coordinate system LaTeX formatting. May24 suggested approved edit on Trying to plot these points in a polar coordinate system May23 answered Prove that 2 students live exactly five houses apart if May23 revised Anti-prime sequence LaTeX formatting May23 suggested approved edit on Anti-prime sequence May23 revised Boundary conditions of an elastic bar LaTeX formatting. May23 suggested approved edit on Boundary conditions of an elastic bar May23 answered Subtract gravity from 3D object in different orientations May23 comment Number of ways of spelling Abracadabra in this grid I think your problem is that you're treating picking the "A" as one of two choices, when there's really nothing you can do about it. Two routes to a B and two from each B to an R gives $2*2 = 4$ ways. May22 revised imaginary numbers - how can I understand them - especially as they occur in 'roots' of polynomials? LaTeX formatting. May22 suggested approved edit on imaginary numbers - how can I understand them - especially as they occur in 'roots' of polynomials? May22 revised Did I sketch this polar curve correctly? LaTeX formatting. May22 suggested approved edit on Did I sketch this polar curve correctly? May22 revised How do I explain why $dA/dr = 2 \pi r$ geometrically? LaTeX formatting. May22 suggested approved edit on How do I explain why $dA/dr = 2 \pi r$ geometrically? May20 comment Logic Puzzle of the age of three sons @Fixee: [chuckle] Yes, but would you SAY that? :P Actually...you'd probably put in a comment about birthdays... :P May19 revised Logic Puzzle of the age of three sons Fixed mistakes and added a bit. May19 comment Logic Puzzle of the age of three sons @svenkatr: Good catch. Editing...