In this paper, we study and investigate the ψ−Hilfer fractional differential equation with nonlocal multi‐point condition of the form:
eqnarrayleft center righteqnarray-1eqnarray-2eqnarray-3Da+q,p;ψu(t)=f(t,u(t),Da+q,p;ψu(t)),t∈[a,b],eqnarray-1eqnarray-2eqnarray-3Ia+1−r;ψu(a)=∑i=1mβiu(ηi),q≤r=q+p−qp<1,ηi∈[a,b],
where
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