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@arXiv_physicsgenph_bot@mastoxiv.page
2025-11-13 08:28:40

The chanciness of time
John M. Myers, Hadi Madjid
arxiv.org/abs/2511.08611 arxiv.org/pdf/2511.08611 arxiv.org/html/2511.08611
arXiv:2511.08611v1 Announce Type: new
Abstract: Digital network failures stemming from instabilities in measurements of temporal order motivate attention to concurrent events. A century of attempts to resolve the instabilities have never eliminated them. Do concurrent events occur at indeterminate times, or are they better seen as events to which the very concept of temporal order cannot apply? Logical dependencies of messages propagating through digital networks can be represented by marked graphs on which tokens are moved in formal token games. However, available mathematical formulations of these token games invoke "markings"-- global snapshots of the locations of tokens on the graph. The formulation in terms of global snapshots is misleading, because distributed networks are never still: they exhibit concurrent events inexpressible by global snapshots. We reformulate token games used to represent digital networks so as to express concurrency. The trick is to replace global snapshots with "local snapshots." Detached from any central clock, a local snapshot records an action at a node during a play of a token game. Assemblages of local records define acyclic directed graphs that we call history graphs. We show how history graphs represent plays of token games with concurrent motions, and, importantly, how history graphs can represent the history of a network operating while undergoing unpredictable changes.
toXiv_bot_toot

@teledyn@mstdn.ca
2025-10-21 18:42:17

I do like #NextCloud but sometimes it can drive me crazy. For example, fresh update, hundreds of errors with astoundingly unhelpful messages. Consider:
chmod(): Operation not permitted at /var/www/nextcloud/apps/recognize/lib/Migration/InstallDeps.php#169
ok, so what do we find at line 169? a call to chmod() on presumably a filename, wrapped in an exception Catch.
I realize this is very much non-trivial software with oodles of hours of difficult work by so many kind people, but, really, how much effort would it have been to include the errant target FILENAME in the exception message?
Similarly, a deprecation warning is, by definition, a Warning, not an error.
None of this affects my using Nextcloud, but it does really clutter the log and who knows, maybe some of these Errors are actually important?

@chriscz@social.linux.pizza
2025-10-20 08:21:20

Seems #cloudflare maintenance (or #aws outage?) is causing some other service outages. Like my Signal messages won't send at all, and some of the team cannot huddle on Slack

@paulbusch@mstdn.ca
2025-12-20 12:59:44

Good Morning #Canada
Prior to #Retirement, my last decade in business was spent in #ReverseLogistics managing major retail and manufacturer clients. Reverse logistics is the process of managing customer returns with the objective of recapturing value or ensure proper disposal. It covers activities like processing, restocking where possible, repairs, recycling, refurbishing, and resale. This company in Mississauga is relatively small in comparison to a Costco or Walmart reverse logistics warehouse but it provides a glimpse at a little known industry that deals with $880B USD in annual returns worldwide. The industry is about to enter its busiest period as consumers will return over 10% of Christmas purchases, close to 30% for clothing. In the 1st 3 months of 2026 some remarketing B2B auction sites (representing Costco, Walmart, Home Depot, Target, etc) will be liquidating 100 tractor trailer loads per day, including stuff you're about to unwrap in a few days.
#CanadaIsAwesome
orilliamatters.com/ontario-new