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StreamPoints

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Option for number of stream lines in StreamPlot

StreamPoints
Row[Table[StreamPlot[{-1 - x ^ 2 + y, 1 + x - y ^ 2}, {x, -3, 3}, {y, -3, 3}, StreamPoints -> n], {n, 5, 35, 10}]] → -Graphics--Graphics--Graphics--Graphics-StreamPlot[{-1 - x ^ 2 + y, 1 + x - y ^ 2}, {x, -3, 3}, {y, -3, 3}, StreamPoints -> points, Epilog -> Point[points]] → -Graphics-StreamPlot[{-1 - x ^ 2 + y, 1 + x - y ^ 2}, {x, -3, 3}, {y, -3, 3}, StreamPoints -> {{{{1, 0}, Red}, {{-1, -1}, Green}, Automatic}}, StreamColorFunction -> None] → -Graphics-

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