pencil

• companion — companion matrix
• ereduc — computes matrix column echelon form by qz transformations
• fstair — computes pencil column echelon form by qz transformations
• glever — inverse of matrix pencil
• kroneck — Kronecker form of matrix pencil
• lyap — Lyapunov equation
• pen2ea — преобразование пучка матриц в E, A
• pencan — canonical form of matrix pencil
• penlaur — Laurent coefficients of matrix pencil
• quaskro — quasi-Kronecker form
• randpencil — random pencil
• rowshuff — shuffle algorithm