A bridge was out, so we made another attempt at a constructive proof of the Koenigs-Pittsburgh bridge problem yesterday. We were joined by Keith, Dan, Christian, and Edward, and dutifully set off on our 27 mile hike to cross every pedestrian-navigable trans-three-river bridge with both endpoints in Pittsburgh. The first one, of course, was the furthest, taking almost 7 miles to get to, and a further 4 to the next bridge.
We, however, found ourselves foiled at our attempts to cross the Liberty Bridge, as the pedestrian walkway was closed due to bridge construction, and the detour signs led to the Smithfield bridge. We decided to also skip the 10th street bridge (which was a bit of a detour anyway, on the original route), and instead skip to the Smithfield, putting us downtown at a better lunch time anyway.
I skipped out after lunch with Keith (who had somewhere to be) due to not feeling so great. I probably could have finished the entire thing (only a total of 25 miles, at that point, thanks to the changes), but I think I’m much happier having dropped out after ~15 of those. I think the lesson, though, is that I need to buy inserts for my shoes… I think the default ones that come with them now distribute weight weirdly and make the back of my knees hurt after a lot of walking.
Steve apparently joined the group after lunch, and they succeeded at the rest of the walk. So even though the proof failed due to two bridges being out, it was still a good experience.
More photos, as always, are at photos.
Have a Bar-B-Cone:
In non-hike news, we went to the library today for the afternoon, and I read this book. Really enjoyed it, and I think it’d be really interesting if there was a Machine-of-Death style compilation of stories for it in terms of how the world is affected by the ability to capture and restore peoples’ “souls”.