Appendices and Auxiliary Results (anmath-supplementary)

When to trigger

• A long, self-contained computation interrupts the main line of argument
• You have auxiliary lemmas that are needed but not conceptually central
• The proof depends on a machine computation that must be documented
• You are tempted to "move detail to supplement" the way science papers do — pause first

Important: pure-mathematics journals generally do not have a science-style "supplemental material" section. Everything essential to the proof stays in the main text and must be fully present and verifiable there. Appendices hold material that is necessary but would break the flow if kept inline.

What belongs where