Skip to content
  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
egrefen's profile
Edward Grefenstette
Edward Grefenstette
Edward Grefenstette
@egrefen

Tweets

Edward Grefenstette

@egrefen

French/American/British AI/ML Research Scientist at @FacebookAI (FAIR), Honorary Associate Prof at @UCL. Ex @CompSciOxford, @DeepMindAI. Opinions my own.

London, United Kingdom
egrefen.com
Joined April 2007

Tweets

  • © 2019 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Denny Britz‏ @dennybritz Jan 25

      Why doesn’t RL use more toy tasks to measure advances in specific aspects of a problem like long term planning, large action spaces, imperfect information, etc? Complex environments such as Starcraft are impressive but make it difficult to disentangle *why* an agent wins.

      12 replies 21 retweets 154 likes
      Show this thread
    2. Edward Grefenstette‏ @egrefen Jan 25
      Replying to @dennybritz

      Because those papers get rejected because lol "gridworlds are solved!!11". 🙄

      1 reply 1 retweet 16 likes
    3. Denny Britz‏ @dennybritz Jan 25
      Replying to @egrefen

      I’m sure I can make you a gridworld you can’t solve :P

      2 replies 0 retweets 2 likes
    4. Edward Grefenstette‏ @egrefen Jan 25
      Replying to @dennybritz

      No need. I've written papers on gridworld RL problems that are, I'm convinced, at least harder than some of the Atari games.

      1 reply 0 retweets 5 likes
    5. Denny Britz‏ @dennybritz Jan 25
      Replying to @egrefen

      Can you point me to them? This actually sounds like a cool project. A collection of grid worlds for different aspects of RL intelligence. I think the key to getting them adopted is to make them…. cute and fun :D

      4 replies 1 retweet 11 likes
      Edward Grefenstette‏ @egrefen Jan 25
      Replying to @dennybritz

      There's this one https://arxiv.org/abs/1806.01946 : 5x5 grid viewed as pixels, 3 objects, 3 possible shapes, 3 possible colours. Simple RL task, right? Wrong. It's instruction conditional, and although there are only a few thousand instructions (a new one every episode), A3C struggles.

      2:12 AM - 25 Jan 2019
      • 2 Retweets
      • 13 Likes
      • Alexey Guzey Sadegh Charmchi Jean-Marc Alkazzi Alessio G krishnan Christopher Prohm nkiruka uzuegbunam ShahRukh Athar Guillermo Puebla
      1 reply 2 retweets 13 likes
        1. New conversation
        2. Edward Grefenstette‏ @egrefen Jan 25
          Replying to @egrefen @dennybritz

          More recently there's https://arxiv.org/abs/1810.08272  by @DBahdanau and some MILA folk. Visually/conceptually simple language-conditional env, difficult tasks.

          1 reply 1 retweet 9 likes
        3. Edward Grefenstette‏ @egrefen Jan 25
          Replying to @egrefen @dennybritz @DBahdanau

          It goes without saying there are probably many more papers which tackle similar problems, but either are consigned to obscurity or rejected by superficial reviewers because they don't "look" hard enough.

          0 replies 1 retweet 1 like
        4. End of conversation

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2019 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info