A back-of-the-envelope calculation is a rough calculation, typically jotted down on any available scrap of paper such as an envelope. It is more than a guess but less than an accurate calculation or mathematical proof. The defining characteristic of back-of-the-envelope calculations is the use of simplified assumptions.

Complex ideas, thoughts and emotions can be approximated within an order of magnitude using simple expressions.

Group show:
Rachael Adams
Gretchen Heffernan
Robert Littleford
Pat Thornton

curated by Rachael Adams and Robert Littleford.