scripts/TP1 08.23a stick falling.DELACE

   1 coefficient(1): a
   2
   3 integrate (y'') -> -y':
   4    IC: +1
   5 integrate (-y') -> y
   6 invert (y) -> -y
   7 sin = y
   8
   9 integrate (omega') -> -omega
  10 a * sin -> a_times_sin
  11 omega' = a_times_sin
  12
  13 invert (-omega) -> omega
  14 multiply (omega, omega) -> omega²
  15 multiply (omega², -y) -> -omega²y
  16 y'' = -omega²y