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visits member for 3 years, 11 months
seen Nov 6 '13 at 3:42

May
11
revised Lie and Weierstrass' visualization of complex functions
Added Math-History tag to the question
Mar
19
revised Isosceles trapezoid
Struck an erroneous statement
Mar
19
revised Isosceles trapezoid
edited body
Mar
19
revised Isosceles trapezoid
added 122 characters in body; deleted 3 characters in body
Mar
19
revised Isosceles trapezoid
added 201 characters in body
Mar
12
revised Linear Algebra of Symmetric Sums: a converse question
added 864 characters in body; added 14 characters in body
Mar
10
revised From baby Hartshorne: showing the exterior of a circle is segment connected
Fixed an erroneous statement in the second proof, clarified the third proof, and added an illustration.; added 6 characters in body
Feb
25
revised What are the postulates that can be used to derive geometry?
added 3 characters in body
Feb
25
revised What are the postulates that can be used to derive geometry?
added 10 characters in body
Feb
25
revised What are the postulates that can be used to derive geometry?
added 29 characters in body
Feb
25
revised What are the postulates that can be used to derive geometry?
added 4 characters in body; edited title
Feb
23
revised Three non-coplanar lines in the 3D-space always have a fourth one that intersect them all?
added 49 characters in body; added 6 characters in body
Feb
22
revised Why is Euclidean geometry scale-invariant?
edited body
Feb
22
revised Why is Euclidean geometry scale-invariant?
added 152 characters in body
Feb
21
revised Why is Euclidean geometry scale-invariant?
added 1823 characters in body
Feb
21
revised Why is Euclidean geometry scale-invariant?
added 1368 characters in body
Feb
21
revised Why is Euclidean geometry scale-invariant?
added 86 characters in body
Feb
21
revised Why is Euclidean geometry scale-invariant?
added 249 characters in body; added 11 characters in body
Feb
11
revised For a polygon on complex plane, when are the vertex 'Fourier coefficients' non-zero
added 16 characters in body
Feb
11
revised For a polygon on complex plane, when are the vertex 'Fourier coefficients' non-zero
added 9 characters in body