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266330元 |
| g.f.中系数的三角形,按行读取:和{n=-oo..+oo}x^n*y^n*(y^n-x^n)^n。 |
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-1, 1, -1, 0, 1, -1, 1, -1, 1, -1, 0, 0, 0, 1, -1, 2, 0, -2, 0, 1, -1, 0, 0, 0, 0, 0, 1, -1, 3, -1, 1, -3, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 1, -1, 4, 0, 0, 0, -4, 0, 0, 0, 1, -1, 0, -3, 0, 3, 0, 0, 0, 0, 0, 1, -1, 5, 0, 0, 0, 0, -5, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 6, -6, 1, -1, 6, 0, -6, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0,0,0,0,0,0,0,0,0,1,-1,7,0,0,0,0,-7,0,0,0,0,0,0,0,1,-1,0,-10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,8,0,4,0,-4,0,0,0,-8,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,-1,9,-15,0,0,0,0,-9,0,0,0,0,0,0,0,0,0,0,0,1,-1,0,0,0,0,0,-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 10, 0, 10, -1, 1, -10, 0, 0, 0, 0, -10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, -21, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 12, -28, 20, 0, 0, 0, -20, 0, 28, 0, 0, 0, -12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, -5, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
(列表;图表;参考;听;历史;文本;内部格式)
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抵消
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0,16
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评论
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比较一下这个奇怪的恒等式:Sum_{n=-oo..+oo}x^n*(1-x^n)^n=0。
请注意,g.f.:
A(x,y)=和{n=-oo..+oo}x^n*y^n*(y^n-x^n)^n
可以写入
A(x,y)=和{n>=0}R(n,y)*x^n/y^(n+1)
这样行多项式R(n,y)由y的平方幂组成:
R(n,y)=和{k=0..n+1}T(n,k)*y^(k^2)。
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链接
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配方奶粉
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通用公式:-(1/y)/(1-z)+(1/y。
行总和都是零。
和{k=0..2*n+1}(-1)^k*T(2*n,k)=(-2)*A260147型(n) 对于n>=0。
当n>=0时,求和{k=0..2*n+2}(-1)^k*T(2*n+1,k)=0。
和{k=0..2*n+1}I^(k^2)*T(2*n,k)=(I-1)*A260147型(n) 对于n>=0,其中I^2=-1。
求和{k=0..2*n+2}I^(k^2)*T(2*n+1,k)=0表示n>=0,其中I^2=-1。
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例子
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系数T(n,k)的三角形开始于:
-1, 1;
-1, 0, 1;
-1, 1, -1, 1;
-1, 0, 0, 0, 1;
-1, 2, 0, -2, 0, 1;
-1, 0, 0, 0, 0, 0, 1;
-1、3、-1、1、-3、0、0、1;
-1、0、0、0、0、0、0、0、1;
-1, 4, 0, 0, 0, -4, 0, 0, 0, 1;
-1, 0, -3, 0, 3, 0, 0, 0, 0, 0, 1;
-1,5,0,0,0,-5,0,0,0,0,1;
-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 6, -6, 1, -1, 6, 0, -6, 0, 0, 0, 0, 0, 1;
-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 7, 0, 0, 0, 0, 0, 0, -7, 0, 0, 0, 0, 0, 0, 1;
-1, 0, -10, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 8, 0, 4, 0, -4, 0, 0, 0, -8, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 9, -15, 0, 0, 0, 0, 15, 0, 0, -9, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 10, 0, 10, -1, 1, -10, 0, 0, 0, 0, -10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 0, -21, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 12, -28, 20, 0, 0, 0, -20, 0, 28, 0, 0, 0, -12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
-1, 0, 0, 0, -5, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1; ...
其中k列>0的g.f.由下式给出:
z^(k-1)*(1-z^。
...
G.f.:A(x,y)=和{n=-oo..+oo}x^n*y^n*(y^n-x^n)^n可以写成
A(x,y)=和{n>=0}R(n,y)*x^n/y^(n+1),其中行多项式R(n、y)由y的平方幂组成:
R(n,y)=和{k=0..n+1}T(n,k)*y^(k^2);
此三角形列出了R(n,y)中y^(k^2)的系数,其开头为:
R(0,y)=y-1;
R(1,y)=y^4-1;
R(2,y)=y^9-y^4+y-1;
R(3,y)=y^16-1;
R(4,y)=y^25-2*y^9+2*y-1;
R(5,y)=y^36-1;
R(6,y)=y^49-3*y^16+y^9-y^4+3*y-1;
R(7,y)=y^64-1;
R(8,y)=y^81-4*y^25+4*y-1;
R(9,y)=y^100+3*y^16-3*y^4-1;
R(10,y)=y^121-5*y^36+5*y-1;
R(11,y)=y^144-1;
R(12,y)=y ^169-6*y ^49+6*y ^25-y ^16+y ^9-6*y ^4+6*y-1;
R(13,y)=y ^196-1;
R(14,y)=y^225-7*y^64+7*y-1;
R(15,y)=y^256+10*y^36-10*y^4-1;
R(16,y)=y^289-8*y^81-4*y^25+4*y^9+8*y-1;
R(17,y)=y^324-1;
R(18,y)=y^361-9*y^100+15*y^49-15*y^4+9*y-1;
R(19,y)=y^400-1;
R(20,y)=y^441-10*y^121-10*y^36+y^25-y^16+10*y_9+10*y-1;
R(21,y)=y^484+21*y^64-21*y_4-1;
R(22,y)=y^529-11*y^144+11*y-1;
R(23,y)=y^576-1;
R(24,y)=y^625-12*y^169+28*y^81-20*y^49+20*y^9-28*y^4+12*y-1;
R(25,y)=y^676+5*y^36-5*y^16-1;
R(26,y)=y^729-13*y^196+13*y-1。。。
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黄体脂酮素
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(PARI)/*打印此三角形的0..50行:*/
{总和=总和(n=-51,51,x^n*y^n*(y^n-x^n+O(x^51))^n);V=Vec(总和);
T(n,k)=polcoeff(V[n+1]*y^(n+1)+y*O(y^
对于(n=0,50,对于(k=0,n+1,打印1(T(n,k),“,”));打印(“”)
(PARI)/*行多项式的快速打印(非正式):*/
{总和=总和(n=-51,51,x^n*y^n*(y^n-x^n+O(x^51))^n);V=Vec(总和);
对于(n=1,50,打印(“R(”n-1“,y)=”V[n]*y^n“;”)}
(PARI)/*比较这些总和(非正式的健全性检查):*/
Axy=总和(n=-16,16,x^n*y^n*(y^n-x^n+O(x^16))^n)
轴=-(1/y)/(1-x/y)+和(n=1,15,y^(n^2-1)*
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