an encyclopedia of finite element definitions

Style guide

All the content on DefElement aims to conform to this style guide. This keeps it clear and consistent.

We use standard British spelling in the content on DefElement.

In general, we follow the Chalkdust style guide (which follows the Guardian style guide with some additional guidance, mostly related to the style of equations). The remainder of this page lists style guidance not covered in the Chalkdust style guide.


This website is called DefElement, with a capital D and capital E, with no space between Def and Element. More detail on referring the site itself can be found on the branding page.


The notation used on DefElement can be found in this list.

Sobolev spaces

When written in text, the spaces H(div) and H(curl) should be written as text, and not in math-mode.