  We investigate the proportional relationships for spectrums and for SJNFs
(Standard Jordan Normal Forms) of the matrices constructed from coefficient
matrices of two SLOCC (stochastic local operations and classical communication)
equivalent states of $n$ qubits. Invoking the proportional relationships for
spectrums and for SJNFs, pure states of $n$ ($\geq 4$) qubits are partitioned
into 12 groups and 34 families under SLOCC, respectively. Specially, it is true
for four qubits.
