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visits member for 2 years, 1 month
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Dec
20
asked How can I find the sum of the even digits of a number of all elements of a list?
Dec
17
revised Perimeter and area are positive integers
added 438 characters in body
Dec
16
revised Perimeter and area are positive integers
added 3 characters in body
Dec
16
revised Perimeter and area are positive integers
added 321 characters in body
Dec
16
revised Perimeter and area are positive integers
added 321 characters in body
Dec
16
revised Perimeter and area are positive integers
added 77 characters in body
Dec
16
revised Perimeter and area are positive integers
added 23 characters in body
Dec
16
revised Perimeter and area are positive integers
added 104 characters in body
Dec
12
accepted How to convert this answer into $\ln$ form?
Dec
12
revised How to convert this answer into $\ln$ form?
edited body
Dec
12
asked How to convert this answer into $\ln$ form?
Dec
11
accepted How to solve this combination equation?
Dec
10
awarded  Popular Question
Nov
19
accepted How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
Nov
18
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
let us continue this discussion in chat
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
I want the triangle ABC is not a right triangle. But with three vertices {{-3, -2, 1}, {-3, -2, 5}, {5, 6, 1}}, this is a right triangle. where is wrong in my code?
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
Maybe my Pick[...] is wrong. Please help me.
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
For example {-3, 4, -1}, {-1, 6, 7}, {3, 6, 7}
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
@DanielLichtblau I can not. Please help me.
Nov
17
comment How to select three points $A$, $B$, $C$ from the following list so that the circle passing $A$, $B$, $C$ has centre $(1,2,3)$?
I check some circle. It's wrong. That is mean center not at $(1,2,3).