Abstract: An approach to a computer-oriented proof search in classical first-order logic leading to the construction of goal-driven sequent calculi that do not require skolemzation and one of which is ...

This is a small collection of formally verified junk theorems provable in Lean 4 + Mathlib that, in my experience, are quite surprising and upsetting to mathematicians who are not familiar with type ...

2025 Roth IRA contribution limit is $7,000, increasing to $7,500 in 2026. Withdrawals from a Roth IRA are tax-free if a person is over 59 1/2 and meets the five-year rule. Roth IRA rollovers must be ...

International Ice Hockey Federation (IIHF) rules at the Olympics differ from the NHL in a few ways: Roster sizes are smaller in Olympic competition than in the NHL Fighting is not permitted in Olympic ...

Accuracy, precision and teamwork are the pillars of curling. First played in late medieval Scotland, the sport has taken center stage at the Winter Olympics since its debut at the 1924 Winter Games.

Netiquette is the digital equivalent of the traditional etiquette. Netiquette (net + etiquette) is the code of proper conduct applied to communication on virtual online spaces. This code is dictated ...

B1.1 - Member Federation Rules 18 JAN 2023 PDF En Fr B2.1 - Area Association Rules 16 JUL 2023 PDF En Fr B3.1 - Governance Rules 12 AUG 2025 PDF En Fr B3.2 - Vetting Rules 09 SEP 2025 PDF En Fr B3.3 - ...

Two on-field rule changes will be implemented beginning this season after MLB’s competition committee unanimously passed them earlier this week. The first involves a modification to the shift rules ...

Over the years, slalom has been one of the biggest attractions at the Winter Olympics. What exactly is the slalom? Slalom is a part of alpine skiing. Alpine skiing consists of five events - downhill, ...