Source-pinned research

Research proof index

Search theorem names, mathematical ideas, modules, topics, projects, and role-labelled researchers. Open a result for its complete indexed Lean declaration and source record.

This index contains 4 research declarations. Search 10,000 more complete Mathlib declarations.

1 topic

4 results

Clear filters
Project-declaredLean 4.32.0

Det exp

Matrix.det_exp

Plain-language statement

The determinant of the exponential of a matrix is the exponential of its trace. This is also known as Lie's trace formula.

physicsquantum field theoryrelativity

Source project: Physlib

Person-level attribution pending.

View proof record
Project-declaredLean 4.32.0

Det exp of block Triangular id

Matrix.det_exp_of_blockTriangular_id

Plain-language statement

Lie's trace formula for upper triangular matrices.

physicsquantum field theoryrelativity

Source project: Physlib

Person-level attribution pending.

View proof record
Project-declaredLean 4.32.0

Det exp real

Matrix.det_exp_real

Plain-language statement

Lie's trace formula over ℝ: det(exp(A)) = exp(tr(A)) for any real matrix A. This is proved by transferring the result from ℂ using the naturality of polynomial identities.

physicsquantum field theoryrelativity

Source project: Physlib

Person-level attribution pending.

View proof record