Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Euler's Formula for planar graphs - 1 or 2 ?

  1. May 26, 2016 #1
    Hi All,
    Regarding the Euler's formula Vertices - Edges + Faces = constant, for planar graphs what is the most frequent number? 1 or 2?

    I understand that it is 2 when the outer region is included in the count.

    Best wishes,

    DaTario
     
  2. jcsd
  3. May 27, 2016 #2

    micromass

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    You can use either formula as long as you make it clear whether you include the outer region or not. I have most usually seen ##2## however.
     
  4. May 27, 2016 #3
    Thank you, micromass.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Euler's Formula for planar graphs - 1 or 2 ?
  1. Isomorphisms of graphs (Replies: 3)

  2. Extremal Graph. (Replies: 1)

  3. Hamiltonian graph (Replies: 8)

  4. Normalising a graph (Replies: 2)

Loading...