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  • 19 votes cast
Feb
19
awarded  Popular Question
Feb
5
awarded  Popular Question
Jul
2
awarded  Curious
May
4
accepted Show that $C(n,k) = C(n-1,k) + C(n-1,k-1)$
May
4
asked Show that $C(n,k) = C(n-1,k) + C(n-1,k-1)$
Dec
12
accepted A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
Dec
12
comment A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
Ok, thank you very much!
Dec
12
comment A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
How about the third attempt?
Dec
12
revised A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
added 157 characters in body
Dec
10
revised Find and draw the image of the triangle with vertices (2,1), (1, 2), (2,2)
added 104 characters in body
Dec
10
asked Find and draw the image of the triangle with vertices (2,1), (1, 2), (2,2)
Dec
9
comment Row Reduction with Cofactor Expansion
Oh, I see. Thank you.
Dec
9
comment Row Reduction with Cofactor Expansion
Thank you! So, why does my calculator and wolframalpha say 396? wolframalpha.com/input/…
Dec
9
asked Row Reduction with Cofactor Expansion
Dec
8
revised A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
added 278 characters in body
Dec
8
revised A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
added 2 characters in body
Dec
8
revised A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
added 71 characters in body
Dec
8
asked A context-free grammar for the language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
Nov
19
accepted Describe the smallest subspace of $M_{2\times 2}$ that contains matrices…
Nov
19
comment Describe the smallest subspace of $M_{2\times 2}$ that contains matrices…
Ah. In that case, the set IS the smallest subspace. It is the basis.