一类凹凸型函数的半线性椭圆型方程的非平凡解的个数问题
일류요철형함수적반선성타원형방정적비평범해적개수문제
The Multiplicities of the Nontrivial Solutions of a Class of Semilinear Elliptic Equations with the Type of Concave-convex Functions
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