yes, i did. i have metric and its null tetrad. there are two ways to find WeylScalar for a metric,as per my knowledge, either by this debever formalism or by using grtensor in maple.
In the Debever formalism, i am not getting how to define this h, in general, for a given metric. and in the grtensor it is showing
Weyl Scalar, NP Psi2
Psi2 = 24364 words. Exceeds grOptionDisplayLimit
Weyl Scalar, NP Psi3
Psi3 = 7294 words. Exceeds grOptionDisplayLimit
Weyl Scalar, NP Psi4
Psi4 = 16947 words. Exceeds grOptionDisplayLimit
grtensor is working fine for the normal metric or for metric given in the grlib, however the kind of metric i am working its quaite complicated and it is showing this error.
so in both ways i am not able to get WeylScalar