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Recursive Jump Operators and Optimal Proof Systems

Announce Type: new Abstract: We study the relationship between the existence of optimal proof systems and recursive jump operators, two central open problems in proof complexity. For a set L, an optimal proof system is a strongest proof system in terms of proof length, whereas a recursive jump operator uniformly transforms any proof system for L into a stronger one with respect to proof length, thereby witnessing non-optimality. It is clear that the existence of a recursive jump operator for...

arXiv CS 8d ago

Jump Trading turns to World Cup forecasting in search of new talent

Jump Trading turns to World Cup forecasting in search of new talent June 10 : Jump Trading has launched a global soccer forecasting competition, inviting participants to predict match outcomes of the 2026 FIFA World Cup, the trading firm said on Wednesday. Aimed at helping Jump identify talent it may not otherwise encounter, the event reflects growing efforts by trading firms to tap broader talent pools. Peer Jane Street has long used mathematical puzzles, datathons and games-based...

Channel News Asia 9h ago

Man attacked by alligator after jumping into swamp during police chase

Man attacked by alligator after jumping into swamp during police chase Bodycam footage captured the moment Victor M. Rivas, 40, allegedly fled a traffic stop, jumped into a swamp and was attacked by an alligator while trying to escape police in Louisiana A man was attacked by an alligator after allegedly jumping into a swamp while trying to avoid a police traffic stop. Victor M. Rivas was detained following a major search effort that required the use of drone technology to locate him in the...

Daily Mirror 1d ago

Live: ASX to open higher, oil prices jump on US-Iran uncertainty, AI stocks at record highs

live Markets live: ASX to open higher, oil prices jump on US-Iran uncertainty and AI stocks at record highs Oil prices jump to a one-week high as the US and Iran provide conflicting updates about how peace talks between the warring nations are progressing. The Australian share market is likely to start its day higher after a surge in AI stocks pushed Wall Street to new record highs. See how the trading day unfolds on our blog.

ABC Australia 7d ago

Bodycam footage shows man fleeing DWI arrest being attacked by alligator after jumping in swamp, police say

Bodycam footage shows man fleeing DWI arrest being attacked by alligator after jumping in swamp, police say Victor Rivas suffered injuries to both arms - Bookmark A Louisiana man faces multiple charges after he allegedly fled a traffic stop, jumped into a swamp and was attacked by an alligator while attempting to evade law enforcement on Sunday evening. Victor M. Rivas, 40, of Montz, was taken into custody following a multi-agency search that required the use of drone technology to locate...

The Independent World 1d ago

The Y chromosome is home to surprising jumping genes

The Y chromosome is home to surprising jumping genes Stephanie Baum Scientific Editor Robert Egan Associate Editor The humble Y chromosome may be the smallest chromosome in the mammalian genome (and getting even smaller), but it is mighty: Genes on the Y chromosome are critical for fertility in males. In a new study in the journal Current Biology, researchers at the University of Michigan Medical School have studied deer mice to outline how the Y chromosome defends itself against decay by...

Phys.org 8d ago

Cruise passenger hailed as hero after jumping into water to save 84-year-old man

A Carnival Cruise Line passenger is being praised as a hero after jumping into the water to help an elderly man who fell from a pier during a cruise stop in Mexico. The incident occurred May 19 while Carnival Jubilee was docked in Costa Maya.Carnival Cruise Line confirmed the incident to Fox News Digital, saying an elderly guest fell into the water while returning to the ship. PASSENGER'S STUNNING $5K CASH TIP LEAVES CRUISE WORKER IN TEARS IN SHOCKING VIDEO"Our security team responded...

Fox News 7d ago

Silo's season 3 trailer promises chaos and time jumps

Silo's season 3 trailer promises chaos and time jumps New episodes premiere on July 3. Apple TV's sci-fi hit Silo is set to return on July 3, so the streamer has dropped a juicy trailer to tide us over. The new footage teases chaos throughout the titular silo and alludes to timey-wimey sci-fi shenanigans of some kind.

Engadget 8d ago

Costs to Hedge the $9 Trillion S&P 500 Rally Jump Ahead of Fed

Costs to Hedge the $9 Trillion S&P 500 Rally Jump Ahead of Fed Sentiment in the US stock market has shifted quickly from fear of missing out to fear of getting wiped out. Traders nervous about a further plunge in US stocks in the coming weeks are loading up on downside protection. That’s pushed the one-month skew, a measure of demand for options to protect against a drop in the S&P 500 Index, from the lowest in a year to a 72nd percentile of observations, according to data compiled by Mandy...

Bloomberg Markets 8h ago

Airline profits set to halve this year as fuel costs jump by $100 billion: IATA

The International Air Transport Association warned that global airlines can expect to see profits plunge by half in 2026 as the rising cost of jet fuel continues to squeeze the industry. Oil prices jumped and jet fuel costs soared after the U.S.-Iran conflict began on Feb. 28, noted IATA's outgoing director general Willie Walsh, adding to the challenges he said airlines have faced in recent years from the Covid-19 pandemic to the war in Ukraine. "As a result, we expect average jet fuel...

CNBC 2d ago