A relational symbol combining approximate equality with equality, indicating quantities that are both approximately and asymptotically equal.
Examples
Approximate equality with stronger equivalence than \approx
\sqrt{10} \approxeq 3.162277660168379
Numerical approximation in physics
m_e \approxeq 9.1093837015 \times 10^{-31} \text{ kg}
Series approximation with high precision
\sum_{n=1}^{\infty} \frac{1}{n^2} \approxeq \frac{\pi^2}{6}