Column Generation

11/4/98


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Table of Contents

Column Generation

Contents

A Classical Paper : The Cutting Stock Problem

The Cutting Stock Problem ...

The Cutting Stock Problem ...

The Cutting Stock Problem ...

Basic Observations

LP Column Generation

Historical Perspective

Historical Perspective : a Dual Approach

Dantzig-Wolfe Decomposition : the Principle

Dantzig-Wolfe Decomposition : Substitution

Dantzig-Wolfe Decomposition : The Master Problem

Dantzig-Wolfe Decomposition : The Column Generator

Dantzig-Wolfe Decomposition : Block Angular Structure

Dantzig-Wolfe Decomposition : Algorithm

Dantzig-Wolfe Decomposition : a Lower Bound

Lagrangian Relaxation Computes the Same Lower Bound

Dantzig-Wolfe vs Lagrangian Decomposition Relaxation

Equivalencies

Equivalencies ...

Equivalencies ...

The Cutting Stock Problem : Kantorovich (1960/1939)

The Cutting Stock Problem : Kantorovich ...

The Cutting Stock Problem : Valerio de Carvalhó (1996)

The Cutting Stock Problem : Valerio de Carvalhó ...

The Cutting Stock Problem : Valerio de Carvalhó ...

The Cutting Stock Problem : Desaulniers et al. (1998)

IP Column Generation

Integrality Property

Integrality Property ...

IP Column Generation : Branch-and-...

IP Column Generation : Branch-and-...

IP Column Generation: Branch-and-...

Application to Vehicle Routing and Crew Scheduling Problems (1981 - …)

Resource Constrained Shortest Path Problem on G=(N,A)

Integer Multi-Commodity Network Flow Structure

Vehicle Routing and Crew Scheduling Problems ...

IP Column Generation : Acceleration Techniques

IP Column Generation : Acceleration Techniques ...

Stabilized Column Generation

Concluding Remarks

“Bridging Continents and Cultures”

Author: Jacques Desrosiers