The **greater-than sign** is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the right, **>**, has been found in documents dated as far back as the 1560s. wikipedia

The **less-than sign** is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the left, <, has been found in documents dated as far back as the 1560s. In mathematical writing, the less-than sign is typically placed between two values being compared and signifies that the first number is less than the second number. wiki2

The **equals sign** or **equality sign**, **=**, is a mathematical symbol used to indicate equality in some well-defined sense. It was invented in 1557 by Robert Recorde. wikipedia

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