llm-srbench/phys_osc/PO8/formula.py

# ===== GROUND TRUTH REFERENCE =====
# NOTE: This ground truth serves as a reference answer for symbolic regression tasks
# This expression is NOT the original function used to generate the training data
# It is provided solely for evaluation and comparison of large model outputs
# DO NOT use this expression as the basis for data generation

def dv_dt(x, t, v):
    beta = 0.3333333333333333
    omega0 = 1.0
    return -beta * np.abs(v)**0.333333333333333 - omega0**2 * x**3