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# Introduction

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### Key Facts

Gyroscopic Couple: The rate of change of angular momentum () = (In the limit).
• = Moment of Inertia.
• = Angular velocity
• = Angular velocity of precession.

Blaise Pascal (1623-1662) was a French mathematician, physicist, inventor, writer and Catholic philosopher.

Leonhard Euler (1707-1783) was a pioneering Swiss mathematician and physicist.

## Overview

Heap Algorithms are a special kind of Modifying Algorithm because they also change the order of the elements. But, modifying is more complicated and it usually takes more time than simple mutating operations.