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Browsing by Author "Q-Heung Choi"

Browsing by Author "Q-Heung Choi"

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  • MULTIPLE SOLUTIONS FOR THE NONLINEAR PARABOLIC PROBLEM 
    Jung Tacksun; Q-Heung Choi (Chungcheong Mathematical Society, 2009-06)
    We investigate the multiple solutions for the nonlinearparabolic boundary value problem with jumping nonlinearity crossingtwo eigenvalues. We show the existence of at least four nontrivialperiodic solutions for the parabolic ...
  • TWO JUMPING NONLINEAR TERMS AND A NONLINEAR WAVE EQUATION 
    Jung Tacksun; Q-Heung Choi (Chungcheong Mathematical Society, 2009-12)
    We find the multiple nontrivial solutions of the equa-tion of the form utt -uxx = b₁[(u+1)+ -1]+b₂[(u+2)+ -2] withDirichlet boundary condition. Here we reduce this problem intoa two-dimensional problem by using variational ...

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