Especially for a torsion angle it requires tedious vector algebra to derive the corresponding values of the s A i t ( \\ displaystyle s_ ( Ai ) ^ ( t ) ) .
A torsion angle involves 4 atoms .
Especially for a torsion angle , which involves 4 atoms , it requires tedious vector algebra to derive the corresponding values of the s A i t ( \\ displaystyle s_ ( Ai ) ^ ( t ) ) .