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Noahpinion's profile
Noah Smith
Noah Smith
Noah Smith
Verified account
@Noahpinion

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Noah SmithVerified account

@Noahpinion

Bloomberg Opinion writer. Elected "top neoliberal shill" of 2018. Occasionally posts anime gifs.

San Francisco, CA
bloomberg.com/view/contribut…
Joined April 2011

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    1. Zach Weinersmith‏Verified account @ZachWeiner Oct 13

      I'm going to teach myself some math, and I'll be asking lots of potentially stupid questions. First up: Is there a difference between saying "a vector space" and "a set of vectors" ?

      26 replies 2 retweets 49 likes
      Noah Smith‏Verified account @Noahpinion Oct 13
      Replying to @ZachWeiner

      Vector space includes the rules for adding and multiplying the vectors.

      6:33 PM - 13 Oct 2018
      • 45 Likes
      • Christian Gonzalez brian as_per_ushe Adam Hall Alex Doser Areopagitica Speedwagon Jorge Loría Regularly scheduled holiness, Pope ZoodleWurdle Preston Mui
      2 replies 0 retweets 45 likes
        1. New conversation
        2. Zach Weinersmith‏Verified account @ZachWeiner Oct 13
          Replying to @Noahpinion

          I'm having trouble imagining what a set of vectors without rules is, but maybe this is somewhat semantic?

          7 replies 0 retweets 2 likes
        3. Zach Weinersmith‏Verified account @ZachWeiner Oct 13
          Replying to @ZachWeiner @Noahpinion

          Ah, okay I think I get it. So, when you just say "vector space" you mean a set of vectors with addition and multiplication allowed. But, when you say e.g. "inner product space" it's *a* vector space where you can also do inner products.

          2 replies 0 retweets 8 likes
        4. Noah Smith‏Verified account @Noahpinion Oct 13
          Replying to @ZachWeiner

          Yeah, if you take a vector space and add a rule for doing inner products, it's an inner product space.

          1 reply 0 retweets 5 likes
        5. Zach Weinersmith‏Verified account @ZachWeiner Oct 13
          Replying to @Noahpinion

          Yeah, but an inner product space is still *a* vector space. That's what was throwing me. Thanks!

          1 reply 0 retweets 4 likes
        6. Noah Smith‏Verified account @Noahpinion Oct 13
          Replying to @ZachWeiner

          NP!

          1 reply 1 retweet 8 likes
        7. Zach Weinersmith‏Verified account @ZachWeiner Oct 13
          Replying to @Noahpinion

          =P

          2 replies 1 retweet 18 likes
        8. Mr. Customer‏ @MisterCustomer Oct 13
          Replying to @ZachWeiner @Noahpinion

          Prove it.

          1 reply 0 retweets 11 likes
        9. Zach Weinersmith‏Verified account @ZachWeiner Oct 13
          Replying to @MisterCustomer @Noahpinion

          I could, but not in finite time.

          1 reply 1 retweet 11 likes
        10. 2 more replies
        1. David Spady‏ @SpadyDavid Oct 13
          Replying to @Noahpinion @ZachWeiner

          I dislike the word space on general principles.

          0 replies 0 retweets 0 likes
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