Ran into frank while sitting in the grad CS lounge hacking on research. Chatted a bit, got a couple of good paper-pointers out of him, one a very recent paper on the subject of higher-order matching, which I seem to find myself obsessed with lately, and the other, in effect, a rebuttal to the logical conclusion of Andrew Appel's dismissal of the LFi-style redundancy elimination programme. My level of care is abruptly higher since I started working this afternoon. Quite refreshing. The mathy bits of my brain seem to be working much better now. Thanks, Hartley Rogers!