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use eqNr #32

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affeldt-aist opened this issue May 28, 2021 · 0 comments

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affeldt-aist commented May 28, 2021

coq-robot/ssr_ext.v

Lines 116 to 121 in ce7c75a

    
           Lemma eqmxNxx (R : numFieldType) n m (u : 'M[R]_(m, n)) : 
        
             (- u == u) = (u == 0). 
        
           Proof. 
        
           apply/idP/idP => [|/eqP ->]; last by rewrite oppr0. 
        
           by rewrite -subr_eq0 -opprD -mulr2n -scaler_nat oppr_eq0 scaler_eq0 pnatr_eq0. 
        
           Qed.

this requires to first declare a numDomainType structure for matrices

affeldt-aist added this to the 0.2 milestone

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