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  /external/apache-commons-math/src/main/java/org/apache/commons/math/ode/nonstiff/
MidpointStepInterpolator.java 92 final double yDot1 = yDotK[0][i];
94 interpolatedState[i] = currentState[i] + coeff1 * yDot1 - coeff2 * yDot2;
95 interpolatedDerivatives[i] = coeffDot1 * yDot1 + coeffDot2 * yDot2;
ClassicalRungeKuttaStepInterpolator.java 99 final double yDot1 = yDotK[0][i];
103 currentState[i] + coeff1 * yDot1 + coeff23 * yDot23 + coeff4 * yDot4;
105 coeffDot1 * yDot1 + coeffDot23 * yDot23 + coeffDot4 * yDot4;
ThreeEighthesStepInterpolator.java 103 final double yDot1 = yDotK[0][i];
108 currentState[i] - coeff1 * yDot1 - coeff2 * yDot2 - coeff3 * yDot3 - coeff4 * yDot4;
110 coeffDot1 * yDot1 + coeffDot2 * yDot2 + coeffDot3 * yDot3 + coeffDot4 * yDot4;
GillStepInterpolator.java 113 final double yDot1 = yDotK[0][i];
118 currentState[i] - coeff1 * yDot1 - coeff2 * yDot2 - coeff3 * yDot3 - coeff4 * yDot4;
120 coeffDot1 * yDot1 + coeffDot2 * yDot2 + coeffDot3 * yDot3 + coeffDot4 * yDot4;
DormandPrince853StepInterpolator.java 331 final double yDot1 = yDotK[0][i];
343 v[0][i] = B_01 * yDot1 + B_06 * yDot6 + B_07 * yDot7 +
346 v[1][i] = yDot1 - v[0][i];
349 v[k+3][i] = D[k][0] * yDot1 + D[k][1] * yDot6 + D[k][2] * yDot7 +
AdaptiveStepsizeIntegrator.java 214 * @param yDot1 work array for the first time derivative of y1
222 final double[] y1, final double[] yDot1)
252 computeDerivatives(t0 + h, y1, yDot1);
257 ratio = (yDot1[j] - yDot0[j]) / scale[j];
GraggBulirschStoerIntegrator.java 590 double[] yDot1 = new double[y0.length];
618 y1, yDot1,
621 interpolator = new DummyStepInterpolator(y, yDot1, forward);
809 computeDerivatives(stepStart + stepSize, y1, yDot1);
881 stepStart = acceptStep(interpolator, y1, yDot1, t);
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