What is a polynomial-time reduction? (NP-Hard + NP-complete)

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  • Опубліковано 25 сер 2024

КОМЕНТАРІ • 17

  • @EasyTheory
    @EasyTheory  3 роки тому +5

    Thanks to my supporters Yuri (UA-cam) and Bruno, Timmy, Micah (Patreon) for making this video possible! If you want to contribute, links are in the video description.

  • @MrPlanes747
    @MrPlanes747 3 роки тому +10

    Right in time for my final in a couple days, thank you!

  • @mariajosepav
    @mariajosepav 3 місяці тому

    Hi, I have a final on Tuesday, and I just wanted to say thank you. I got more out of this than a 2 hour lecture. I like how you get to the point in a way that is easy to understand and I am very thankful that I found your channel.

  • @pauminguetmarti18
    @pauminguetmarti18 Рік тому +2

    Extremely helpful. Very concise and well explained. Best video i've found on the topic. Thanks for making it.

  • @YuriValentines
    @YuriValentines 2 роки тому +2

    This video explains just what i needed for my final in complexity and computability in two days. Thank you so much, king, it really was helpful!!!

  • @Kleinnnn
    @Kleinnnn 3 роки тому +11

    Thank you for the clarity! As I'm studying this, it would be helpful to have some examples of actual problems being NP-hard but not complete, and also some examples of languages to which all NP problems can be reduced, but that are not in NP, together with the class to which they belong. Btw, very nice contents, keep it up!

  • @mprerr8967
    @mprerr8967 3 роки тому +3

    You da goat bossman, ty for all of these videos

  • @serhiis.2216
    @serhiis.2216 3 роки тому

    The best video I've ever seen about the theory of algorithms

  • @robblake8999
    @robblake8999 Рік тому

    Thank you very much! I was given the definitions of NP-hard and NP-complete with no context or real explanation, so they never really made sense to me. This video explained very well.

  • @stevenchiu8560
    @stevenchiu8560 Рік тому

    very clear. thanks man

  • @yasseribourk4946
    @yasseribourk4946 2 роки тому +1

    4:26 what if B was in P ?

    • @bluemanczstudio4448
      @bluemanczstudio4448 2 роки тому

      It's not a problem to reduce B in P to A in P/NP. The opposite direction is the real question here.

  • @manuelsteele8030
    @manuelsteele8030 10 місяців тому

    I am a PhD student in data science at Arizona State. Is that your Alma Mater too? The data science program is new and began in 2021. I was admitted with the first class and have six master's degrees. I am currently enrolled in CSE 550 which is on combinatorial theory with heavy focus on NP topics. I am using this channel to supplement the lectures. Thanks for the great teaching!

  • @shiewhun1772
    @shiewhun1772 7 місяців тому

    I got lost precisely at 2:19. What is Sigma Star? And then what is Gamma Star? I am not claiming you're not a great explainer. You are, and it's why I'm subscribed. I am just saying at 2:19, I stopped being able to follow this video.

    • @mehmetalitoy3929
      @mehmetalitoy3929 4 місяці тому

      Sir, I guess star means that they have like infinite inputs. The all combination of the input (Gamma, Sigma or whatever you want) will be showed via star. We say that we have inifinite set of Sigma, for example.

  • @nicholascunningham6936
    @nicholascunningham6936 Рік тому

    "It's NP but it's not in P" ok, I get what you're saying, but the wording of that is so confusing 😅 Could say something like "It's in the set NP but not in the subset P"