New posts in Classical Invariant Theory

What are all invariant polynomials on the space of algebraic curvature tensors?

A curious identity involving a covariant of binary cubic forms

Explicit formulas for invariants of binary quintic forms

What is currently feasible in invariant theory for binary forms?

area of triangle from coefficients of its cubic?

Quotient space of $\mathbb{C}^5$ under the action of $SL(2,\mathbb{C})$