I have been trying for days to understand where the following bound in a paper by Wei & Yan comes from:
More precisely, $ U(r):=(1+r^2)^{-1} $ for every $r\in[0,\infty[$ and $\lambda_j,\mu>$ are constants. I am grateful for any suggestion.
2026-04-01 19:59:01.1775073541
Upper bound for solution of an ODE
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