Recent content by ff4ever

  1. ff4ever

    Graduate What does it mean? (Graph theory)

    Okay. Now I understand. Thanks a lot !
  2. ff4ever

    Graduate What does it mean? (Graph theory)

    Hi, In the paper "A triangle-free circle graph with chromatic number 5" from A.A. Ageev, I don't understand what the author mean with the following definition: Somebody can explain it to me? (I'm not mathematician). Thanks ! Link to the whole paper...
  3. ff4ever

    Who is the new guy from Belgium joining PF?

    Hi, I'm a new guy from Belgium. I am student but not in physics or mathematics, however I love it, so here I am. :smile: