permutation involution

permutation that is its own inverse

en-US/ˌpɝmjuˈteɪʃən ˌɪnvəˈluʃən/
en-GB/ˌpɜːmjuːˈteɪʃən ˌɪnvəˈluːʃn/

الفئات:

permutationinvolution