supported by the Guangdong Provincial Natural Science Foundation (Grant Nos.10152606101000000 and S2012040007653);National Natural Science Foundation of China (Grant No.11271142)
We obtain all positive integer solutions(m1,m2,a,b) with a > b,gcd(a,b) = 1 to the system of Diophantine equations km21- lat1bt2a2r= C1,km22- lat1bt2b2r= C2,with C1,C2 ∈ {-1,1,-2,2,-4,4},and k,l,t1,t2,r ∈ Z ...
Supported by NSF of China (Grant No. 11271142) and the Guangdong Provincial Natural Science Foundation (Grant No. $2012010009942).
Let H be an abelian group written additively and k be a positive integer. Let G(H,k) denote the digraph whose set of vertices is just H, and there exists a directed edge from a vertex a to a vertex b if b = ka. In t...
Γ(x):=integral fromn=0 to ∞(e^(-t)t^(x-1)dt),x>0为gamma函数。设f(x):=logΓ(x)+logΓ(1-x),x∈Q(0,12]。证明如果存在有理数y0∈Q(0,12],使得f(y0)=logΓ(y0)+logΓ(1-y0)∈Q,则集合{eαπ|α∈珚Q}中恰好有一个代数数,即e-f(y0)...