For a listing of past activities announced on Techmath and Techmath2 going back to 16 December 2011, see this.

For a listing of past activities announced on Techmath and Techmath2 between 24 February 1998 and 15 December 2011, see this.

For an older list of past activities, also before February '98, see this.

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(Today's activities)

(Future activities)