Usually, two multifunctions S,T : X → Y are said to have a coincidence if there exists a point (x,y) ∈ X × Y and U : Y → X, (x,y) ∈ X × Y is also called a coincidence of T and U if y ∈ T_x and x ∈ Uy.

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1992
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다운로드다국어 초록 (Multilingual Abstract)
Usually, two multifunctions S,T : X → Y are said to have a coincidence if there exists a point (x,y) ∈ X × Y and U : Y → X, (x,y) ∈ X × Y is also called a coincidence of T and U if y ∈ T_x and x ∈ Uy.
Usually, two multifunctions S,T : X → Y are said to have a coincidence if there exists a point (x,y) ∈ X × Y and U : Y → X, (x,y) ∈ X × Y is also called a coincidence of T and U if y ∈ T_x and x ∈ Uy.
L∞ ESTIMATES OF OPTIMAL ORDER FOR GALERKIN METHODS TO SECOND ORDER HYPERBOLIC DIFFERENTIAL EQUATIONS
POINTWISE DECAY ESTIMATES OF SOLUTIONS OF THE GENERALIZED ROSENAU EQUATION
ON THE TYPE OF PLANE CURVE SINGULARITIES ANALYTICALLY EQUIVALENT TO THE EQUATION WITH gcd(n,k)=1