# De Morgan's Theorems

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The two theorems suggested by De-Morgan which are extremely useful in Boolean Algebra are as following.

## Theorem 1

The left hand side (LHS) of this theorem represents a NAND gate with input A and B where the right hand side (RHS) of the theorem represents an OR gate with inverted inputs.

This OR gate is called as

**Bubbled OR**.

Table showing verification of the De-Morgans's first theorem

## Theorem 2

The LHS of this theorem represented a NOR gate with input A and B whereas the RHS represented an AND gate with inverted inputs.

This AND gate is called as

**Bubbled AND**.

Table showing verification of the De-Morgans's second theorem