Recent content by happppy

  1. H

    Make the layer not transparent in photoshop?

    the layer used to be blank(white) but somehow it turned transparent(the checkerboard pattern).
  2. H

    Make the layer not transparent in photoshop?

    the layer used to be blank(white) but somehow it turned transparent(the checkerboard pattern).
  3. H

    solve ODE dy/dt= -y^(1/2) for y(t)?

    with initial condition y(0)=1
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