2. The inverted triangle symbol in mathematics.

3. What do regular triangles and inverted triangles mean in mathematics?

4. What is the meaning of the inverted triangle in the mathematical formula?

1. It is a gradient operator, pronounced Naibula, which means total differential in all directions of space, and acts on multivariate functions to represent vectors whose components are partial derivatives.

2. This operation symbol will be used in gradient, divergence and curl in advanced mathematics, and the divergence of curl in its second derivative is also called Laplace operator.