formulation error

[valencebond]

all sum func in eq 2 should be product and the Cij is not the same as Eq 1

please correct me if there is something wrong. thanks

[Dorniwang]

yes，i found this and confuse about it too

[valencebond]

hi @Dorniwang , if eq2 is wrong, so all the following formulation is wrong ? or Is there any influence on following formulation?

[sandylaker]

hi @Dorniwang , if eq2 is wrong, so all the following formulation is wrong ? or Is there any influence on following formulation?

The sum of C_ij w.r.t. i equals 1. I.e., for each j, C_ij has only 1, and others are all 0. Thus, the product is equal to the sum.