With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: In mathematics, the multiplicative ergodic theorem, or Oseledets theorem provides the theoretical background for computation of Lyapunov exponents of a nonlinear dynamical system.
text_B: In mathematics, Oseledets theorem provides the theoretical background for computation of Lyapunov exponents of a nonlinear dynamical system.
entailment.