* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Sunday, July 27, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Top 5 entertainment news: Sandeep Reddy Vanga regrets trimming Animal’s runtime by 7-8 minutes, Akshay Ku – Times of India

    Top 5 Entertainment Highlights: Sandeep Reddy Vanga Reveals Why He Trimmed Animal’s Runtime by 7-8 Minutes, Plus Akshay Ku Updates

    Cote de Pablo reveals how Michael Weatherly used his soap opera roots to put her at ease in “NCIS” love scene – yahoo.com

    Cote de Pablo Reveals How Michael Weatherly’s Soap Opera Background Made Their “NCIS” Love Scene Easier

    City of Pelham announces entertainment district plans for former Oak Mountain Amphitheatre site – WVTM

    Pelham Unveils Exciting New Entertainment District Plans for Former Oak Mountain Amphitheatre Site

    Black Box Players presents ‘The Three Musketeers’ – CBS 19 News

    Experience the Adventure: Black Box Players Bring ‘The Three Musketeers’ to Life!

    AP Entertainment SummaryBrief at 1:51 p.m. EDT – Channel 3000

    Entertainment Highlights: Key Updates You Can’t Miss

    ‘Devil Wears Prada 2’ casts Anne Hathaway’s love interest replacing Adrian Grenier’s Nate – Entertainment Weekly

    Devil Wears Prada 2′ Casts New Love Interest for Anne Hathaway, Replacing Adrian Grenier’s Nate

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    AI’s race in the dark with China – Axios

    The High-Stakes AI Race: Innovation and Competition in the Shadows

    Eagle Unveils Revolutionary X-Ray Technology at Pack Expo

    Validea’s Top Information Technology Stocks Based On Peter Lynch – 7/25/2025 – Nasdaq

    Validea’s Top Information Technology Stocks Based On Peter Lynch – 7/25/2025 – Nasdaq

    WhoFi: New surveillance technology can track people by how they disrupt Wi-Fi signals – Tech Xplore

    WhoFi: New surveillance technology can track people by how they disrupt Wi-Fi signals – Tech Xplore

    Google Cloud Announced as a Key Technology Partner for Odoo Connect 2025 in San Francisco – GlobeNewswire

    Google Cloud Announced as a Key Technology Partner for Odoo Connect 2025 in San Francisco – GlobeNewswire

    Behind the Screens: The Impact of Technology on Real Estate – TRREB

    Behind the Screens: How Technology is Transforming the Future of Real Estate

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Top 5 entertainment news: Sandeep Reddy Vanga regrets trimming Animal’s runtime by 7-8 minutes, Akshay Ku – Times of India

    Top 5 Entertainment Highlights: Sandeep Reddy Vanga Reveals Why He Trimmed Animal’s Runtime by 7-8 Minutes, Plus Akshay Ku Updates

    Cote de Pablo reveals how Michael Weatherly used his soap opera roots to put her at ease in “NCIS” love scene – yahoo.com

    Cote de Pablo Reveals How Michael Weatherly’s Soap Opera Background Made Their “NCIS” Love Scene Easier

    City of Pelham announces entertainment district plans for former Oak Mountain Amphitheatre site – WVTM

    Pelham Unveils Exciting New Entertainment District Plans for Former Oak Mountain Amphitheatre Site

    Black Box Players presents ‘The Three Musketeers’ – CBS 19 News

    Experience the Adventure: Black Box Players Bring ‘The Three Musketeers’ to Life!

    AP Entertainment SummaryBrief at 1:51 p.m. EDT – Channel 3000

    Entertainment Highlights: Key Updates You Can’t Miss

    ‘Devil Wears Prada 2’ casts Anne Hathaway’s love interest replacing Adrian Grenier’s Nate – Entertainment Weekly

    Devil Wears Prada 2′ Casts New Love Interest for Anne Hathaway, Replacing Adrian Grenier’s Nate

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    AI’s race in the dark with China – Axios

    The High-Stakes AI Race: Innovation and Competition in the Shadows

    Eagle Unveils Revolutionary X-Ray Technology at Pack Expo

    Validea’s Top Information Technology Stocks Based On Peter Lynch – 7/25/2025 – Nasdaq

    Validea’s Top Information Technology Stocks Based On Peter Lynch – 7/25/2025 – Nasdaq

    WhoFi: New surveillance technology can track people by how they disrupt Wi-Fi signals – Tech Xplore

    WhoFi: New surveillance technology can track people by how they disrupt Wi-Fi signals – Tech Xplore

    Google Cloud Announced as a Key Technology Partner for Odoo Connect 2025 in San Francisco – GlobeNewswire

    Google Cloud Announced as a Key Technology Partner for Odoo Connect 2025 in San Francisco – GlobeNewswire

    Behind the Screens: The Impact of Technology on Real Estate – TRREB

    Behind the Screens: How Technology is Transforming the Future of Real Estate

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Researchers Refute a Widespread Belief About Online Algorithms

November 20, 2023
in Science
Researchers Refute a Widespread Belief About Online Algorithms
Share on FacebookShare on Twitter

When they study these problems, scientists like to envision them as games against an adversary. The adversary chooses a devilish sequence of requests to make the online algorithm perform as badly as possible compared to its offline counterpart. To rob the adversary of some of its power, researchers use algorithms that include random decisions.

This strategy is quite effective, and researchers have suspected since the early 1990s that you can always find a randomized algorithm that reaches a specific performance goal: a competitive ratio proportional to log k, where k is the number of agents. This is called the randomized k-server conjecture, and researchers have shown that it’s true for some spaces, or specific collections of points (the equivalent of houses that could call for plumbers). But it hasn’t been proved for all cases.

Like most researchers, Rabani and his co-authors — Sébastien Bubeck of Microsoft Research and Christian Coester of the University of Oxford — figured the conjecture was true. “I had no reason to doubt it,” Coester said.

But that started to change as they worked on another online problem. It had connections to the k-server problem, and the known lower limit on the competitive ratio was unexpectedly high. It made them think perhaps a goal as low as log k for the k-server problem was overly optimistic.

Rabani said it was Coester who first suggested that the randomized k-server conjecture might be false. “As soon as he said it, it all made sense.”

To disprove the conjecture, the authors played the adversary, creating a perfect storm that would prevent any online algorithm from reaching a competitive ratio of log k. Their strategy had two parts: They constructed a family of complex, fractal-like spaces and designed a distribution of request sequences that would be difficult for any possible algorithm. On the algorithm’s very first move, the structure of the space meant it had to choose between two identical paths, one of which would eventually require extra travel based on the requests. Then the authors used a method called recursion to build spaces that multiplied these decision points, forcing the algorithm into a morass of bad options and driving up the cost.

The choices reminded Rabani of the Robert Frost poem “The Road Not Taken,” in which a traveler contemplates two potential paths through a yellow wood. “We just apply the poem recursively,” he joked. “And then things go really bad.”

The authors showed that, in the spaces they had constructed, a randomized algorithm can never achieve a competitive ratio better than (log k)2, pushing a universal goal of log k forever out of reach. They had refuted the conjecture.

This work, which won a Best Paper Award at the 2023 Symposium on Theory of Computing, marks a “solidly theoretical” milestone, Gupta said. This kind of result helps indicate what kind of performance we can hope for from our algorithms. In practice, however, algorithm designers often aren’t planning around worst-case scenarios, with an omnipotent adversary and complete ignorance of the future. When algorithms are unleashed on real-world problems, they often exceed theoretical expectations.

The paper, which also proved cutoffs for randomized algorithms used for other problems, could also have implications for future work in the field. The result clearly “highlights the power” of the technique the authors used, Gupta said.

Perhaps those future findings will defy researchers’ expectations as this one did, Rabani said. “This is one of the cases where it feels really good to be wrong.”

Quanta is conducting a series of surveys to better serve our audience. Take our computer science reader survey and you will be entered to win free Quanta merchandise.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Quanta Magazine – https://www.quantamagazine.org/researchers-refute-a-widespread-belief-about-online-algorithms-20231120/

Tags: RefuteResearchersscience
Previous Post

NSF Director Panchanathan headlines the Canadian Science Policy Conference in Ottawa, signs international collaboration arrangement

Next Post

X’s CEO tells staff data will show efforts to fight hate, as advertisers flee

AI’s race in the dark with China – Axios

The High-Stakes AI Race: Innovation and Competition in the Shadows

July 27, 2025
LeBron James’ future with Lakers beyond 2025-26 certain to generate speculation leading up to training camp – Yahoo Sports

LeBron James’ Lakers Future Beyond 2025-26 Sparks Intense Speculation Ahead of Training Camp

July 27, 2025
Energy landscapes direct the movement preferences of elephants – besjournals

Energy landscapes direct the movement preferences of elephants – besjournals

July 27, 2025
At United Nations Summer Program, Computer Science Student Examines AI Ethics – Georgetown University

At United Nations Summer Program, Computer Science Student Examines AI Ethics – Georgetown University

July 27, 2025
Return of wolves to Yellowstone has led to a surge in aspen trees unseen for 80 years – Live Science

Wolves’ Return to Yellowstone Sparks Unprecedented Aspen Tree Boom After 80 Years

July 27, 2025
‘Bluey’ Is Growing Up: BBC Plots All-Ages Expansion For The Franchise As A Full-Fledged Lifestyle Brand – Cartoon Brew

‘Bluey’ Is Growing Up: BBC Plots All-Ages Expansion For The Franchise As A Full-Fledged Lifestyle Brand – Cartoon Brew

July 27, 2025
Katie Ledecky, Summer McIntosh and a race for the ages at World Swimming Championships – NBC Sports

Katie Ledecky and Summer McIntosh Ignite an Epic Showdown at the World Swimming Championships

July 27, 2025
5 ways Trump has shaped the economy in 6 months – The Hill

5 Game-Changing Ways Trump Transformed the Economy in Just 6 Months

July 27, 2025
Flutter Entertainment Announces Pricing Of $1.272 Bln Of Additional Senior Secured Notes Due 2031 – Nasdaq

Flutter Entertainment Raises $1.27 Billion in Major Senior Secured Notes Offering Due 2031

July 27, 2025
KFF Health Tracking Poll: Public Views on Recent Tax and Budget Legislation – KFF

How the Public Really Feels About the Latest Tax and Budget Changes

July 27, 2025

Categories

Archives

July 2025
MTWTFSS
 123456
78910111213
14151617181920
21222324252627
28293031 
« Jun    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (741)
  • Economy (765)
  • Entertainment (21,645)
  • General (16,135)
  • Health (9,803)
  • Lifestyle (773)
  • News (22,149)
  • People (767)
  • Politics (774)
  • Science (15,980)
  • Sports (21,263)
  • Technology (15,747)
  • World (748)

Recent News

AI’s race in the dark with China – Axios

The High-Stakes AI Race: Innovation and Competition in the Shadows

July 27, 2025
LeBron James’ future with Lakers beyond 2025-26 certain to generate speculation leading up to training camp – Yahoo Sports

LeBron James’ Lakers Future Beyond 2025-26 Sparks Intense Speculation Ahead of Training Camp

July 27, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version