Wikipedia:Articles for deletion/Auxiliary field
The IDEA of using a constructed "auxiliary field" to simplify calculation is a common technique in mathematical physics, and QFT in particular. As such THAT concept would certainly pass .  A comment on the article correctly points out that the "H" field in electromagnetism is sometimes referred to as an auxiliary field in that vein
— NONE, NONE
Stance: keep
Cited policy: WP:GNG (Wikipedia:Notability)