Current membership rates are eight pounds for a year and fifteen pounds for life. Non-members may attend any speaker meeting for one pound, refundable on joining. Members of the Cambridge University Archimedean Society are deemed to be members of the Invariant Society while they are in Oxford, and as such may attend Invariant meetings for free. The latest issue of the 'Invariant' magazine is now available. Copies cost one pound and are available after meetings - or request a copy from Ian Collier .
Invariant scarves are now available.
The e-mail list is now up and running.