Mistakes and changes

Care goes into this material, and even so it carries no promise of being complete, current, or error-free. What is described here can change without this page changing with it.

External links

Pages elsewhere are revised on their owners' schedules, not this one's. What a link pointed to when it was added may not be what it points to today.

Updates to this notice

This notice can be updated. The version published here is always the one that applies.

Questions

[email protected] is the address for correspondence about anything written on these pages.