second example, Rosenbrock’s banana function f(u) = 100 ∗ (u2 − u2 1)2 + (1 − u 1)2

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2 second example, Rosenbrock’s banana function $f (u) = 100 * (u_{2} - u_{1}^{2})^{2} + (1 - u_{1})^{2}$

2.1 compare steepest descent optimal step with ﬁxed step h=0.1

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