C0
C0[p10, p12, p20, m1^2, m2^2, m3^2]
is the scalar Passarino-Veltman C0 function. The convention for the arguments is that if the denominator of the integrand has the form ([q2−m12][(q+p1)2−m22][(q+p2)2−m32]), the first three arguments of C0 are the scalar products p10=p12, p12=(p1−p2).(p1−p2), p20=p22.
See also
Overview, B0, D0, PaVe, PaVeOrder.
Examples
C0[a, b, c, m12, m22, m32]
C0(a,b,c,m12,m22,m32)
C0[b, a, c, m32, m22, m12] // PaVeOrder
C0(a,b,c,m12,m22,m32)
PaVeOrder[C0[b, a, c, m32, m22, m12], PaVeOrderList -> {c, a}]
C0(c,a,b,m32,m12,m22)