If Is a Differential K-Form, Where K $\ge$ 1 Is an Even Integer, Then D( )

If is a differential k-form, where k $\ge$ 1 is an even integer, then d(11ee7bca_9ca8_75a3_ae82_5bb03b7ccf94_TB9661_11 11ee7bca_bb52_09d4_ae82_b1647c52c988_TB9661_11 d11ee7bca_9ca8_75a3_ae82_5bb03b7ccf94_TB9661_11 ) = 11ee77e1_7790_d05a_a0f8_a17fe7d15046_TB9661_11 .