investigate combining PDG with NIST's DLMF

[bhpayne]

DLMF content is available (e.g., http://dlmf.nist.gov/1.2.E2.tex) but this page https://dlmf.nist.gov/about/notices indicates there are restrictions on bulk access and copyright.

Based on this page https://dlmf.nist.gov/about/staff contacting the editors with a proposal detailing the potential intersection of DLMF with the PDG might have some traction.

[bhpayne]

• emailed [email protected] on Sept 11; no response
• emailed [email protected] on Sept 21 based on https://dlmf.nist.gov/about/staff