ocr: - - - - - - - +-t - 1 - - 4 - - . L - VAA - / - - / - - - - - - - - - 4 l - - - - - - - - - - - - - - - - - - - - H4 - - - 1.3.4. This is a garden-vanety 1.3.5. This is the phase portrait of thc vectorficld in the plane, The zero vec- vectortield to the left The trujcclory ul to uppcurs unce. as the velociry vector the critical point is again piled up on the of the critical point. E C. Nearby, dhe cnitical point [cis a constant trajoctory. VECLUS are short.