Vivek Agarwal's presentation discusses the meaning and types of amalgamation. Amalgamation is when two or more companies combine to form a new entity. It results in the dissolution of the original companies and establishment of a new company with a unique name and identity. There are two main types of amalgamation - amalgamation in the nature of a merger, where shareholders of the combining companies become shareholders of the new company, and amalgamation in the nature of a purchase, where one company purchases the other. Purchase consideration is the amount paid by the purchasing company and can be calculated in different ways such as lump sum payment or net asset value method.