Spatial-Temporal Adaptive-Order Positivity-Preserving WENO Finite Difference Scheme with Relaxed CFL Condition for Euler Equations with Extreme Conditions: Spatial-temporal adaptive-order positivity-preserving WENO finite difference scheme with relaxed CFL condition for Euler equations with extreme conditions - Li, Jia-Le; Don, Wai-Sun; Wang, Cai-Feng; Wang, Bao-Shan (Advances in Applied Mathematics and Mechanics, 2025)