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Text File  |  1994-08-10  |  379b  |  13 lines
  1. #expand:=on
  2. #vy:=20
  3. #plot2y((1-exp(-vy*y))/(1-exp(-vy)),y, y,-0.1,1,-0.1,1)
  4. #c:=-k1*x^2-k2*x+k1*y^2+k3*y+k4
  5. #d(d(c,x),x)+d(d(c,y),y)
  6. c:=-exp(k2*vy-vy*y+k3*vx-k4*vx*x)/vy/vx
  7. #c:=-k1*x^2-k2*x+k1*y^2+k3*y+k4
  8. d(d(c,x),x)+d(d(c,y),y)+vx*d(c,x)+vy*d(c,y)
  9. #c:=-1/vy+(1/vy^2+k1*y*2/vy+2*k2/vy)
  10. #c:=-exp(k2*vy-vy*y)/vy
  11. #d(d(c,y),y)+vy*d(c,y)
  12. #dsolve(c'(y)=-vy*c(y)+k1,c(y),y)
  13.