CID Relation

C Continuous
I Integrable
D Differentiable

The CID Relation:

$latex D to C, C to I$
=>
$latex D to I$

What it means a curve (function) is :
1. Continuous = not broken curve
2. Differentiable = no pointed ‘V’ or ‘W’ shape curve
3. Integrable: can compute the area under the (unbroken) curve.