Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
Function: rinvariant () Forms the Kretchmann-invariant (kinvariant) obtained by contracting the tensors
lriem[i,j,k,l]*uriem[i,j,k,l].
This object is not automatically simplified since it can be very large.
(%o1) true (%i2)