|
Search: id:A136455
|
|
|
| A136455 |
|
Characteristic polynomials of the inverse beta function based matrices as a triangle of integer coefficients: n*IM(i,j)=n*Inverse(1/Gamma(i,j));i.j>=n. |
|
+0 1
|
|
| 1, 0, 1, -1, 1, 1, -48, 28, 25, -1, 233280, -91368, -60993, 2305, 1, 222953472000, -65503641600, -33198846720, 985867696, 446161, -1, -69132994560000000000, 16249035196800000000, 6593300559405000000, -157196644177875000, -59060479175425, 144069601, 1
(list; table; graph; listen)
|
|
|
OFFSET
|
1,7
|
|
|
COMMENT
|
Based on:
Beta[n,m]=Gamma[n]*Gamma[m]/Gamma[n+m]=Integate[x^n&(1-x)^m,{x,0,1}];
f[x,n]=x^n/Gamma[n]
g[x,n]=(1-x)^n/Gamma[n]
Integral:
Matrix[n,m]=Integrate[f[x,n]*g[x,m],{x,0,1}]=1/Gamma[n,m]
IM[n]=n*Inverse[Matrix[n,m]]
These matrices are made to be like the transorthogonal or simplex coding :
-1/(2^n-1)
1/Gamma[n+m] is mostly less than that.
The row sums are:
1, 1, 1, 4, 83225, 125237297536, -46447914508307980823,
-7674877258831704425297015668284,
826995023940325227060455484795500305924239025,
78707026870454795917065346205715405165749494298851023916447744,
-8564339911597252330069530473576149288702875987041232549818479682054967832279248559, -1336289257117044917306250532620084989502533702227664929930431988712778911134146754043951495782103516647100
|
|
REFERENCES
|
Weisstein, Eric W. "Beta Function." http : // mathworld.wolfram.com/BetaFunction.html
|
|
LINKS
|
Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Mar 20 2008, Table of n, a(n) for n = 1..78
|
|
FORMULA
|
M(i,j)=1/Gamma[i+j];i,j<=n IM(i,j)=Inverse(M(i,j))
|
|
EXAMPLE
|
{1},
{0, 1},
{-1, 1, 1},
{-48, 28, 25, -1},
{233280, -91368, -60993, 2305, 1},
{222953472000, -65503641600, -33198846720, 985867696, 446161, -1}
|
|
MATHEMATICA
|
M[w_] := Table[Table[1/Gamma[n + m], {n, 0, w}], {m, 0, w}] IM[w_] := Inverse[M[w]] Join[{1, x}, Table[CharacteristicPolynomial[n*IM[n], x], {n, 1, 10}]] a = Join[{{1}, {0, 1}}, Table[CoefficientList[CharacteristicPolynomial[n*IM[n], x], x], {n, 1, 10}]]; Flatten[a] Join[{1, 1}, Table[Apply[Plus, CoefficientList[CharacteristicPolynomial[n*IM[n], x], x]], {n, 1, 10}]]
|
|
CROSSREFS
|
Sequence in context: A033368 A128380 A094658 this_sequence A085517 A033694 A156461
Adjacent sequences: A136452 A136453 A136454 this_sequence A136456 A136457 A136458
|
|
KEYWORD
|
uned,tabl,sign
|
|
AUTHOR
|
Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Mar 20 2008
|
|
|
Search completed in 0.924 seconds
|