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7.5.21.0. areEqualLeftFractions
Procedure from library olga.lib (see olga_lib).
- Usage:
- areEqualLeftFractions(a, b, locType, locData), vector a, b,
int locType, list/vector/intvec locData
- Purpose:
- check if two given fractions are equal
- Assume:
- Return:
- int
- Note:
- returns 1 or 0, depending whether a=b as fractions in the
localization specified by locType and locData
Example:
| | LIB "olga.lib";
ring R = 0,(x,y,Dx,Dy),dp;
def S = Weyl();
setring S; S;
==> // coefficients: QQ
==> // number of vars : 4
==> // block 1 : ordering dp
==> // : names x y Dx Dy
==> // block 2 : ordering C
==> // noncommutative relations:
==> // Dxx=x*Dx+1
==> // Dyy=y*Dy+1
// monoidal
poly g1 = x*y+3;
poly g2 = y^3;
list L = g1,g2;
poly s1 = g1;
poly s2 = s1*g2;
poly s3 = s2;
poly r1 = Dx;
poly r2 = g2*r1;
poly r3 = s1*r1+3;
vector fracm1 = [s1,r1,0,0];
vector fracm2 = [s2,r2,0,0];
vector fracm3 = [s3,r3,0,0];
areEqualLeftFractions(fracm1, fracm2, 0, L);
==> 1
areEqualLeftFractions(fracm1, fracm3, 0, L);
==> 0
areEqualLeftFractions(fracm2, fracm3, 0, L);
==> 0
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