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Topic: 4 colors problem
Replies: 86   Last Post: Mar 13, 2014 4:36 PM

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Brian Q. Hutchings

Posts: 6,149
Registered: 12/6/04
also, what is the spatial analog
Posted: Mar 5, 2014 5:36 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

it is better to work on a spherical map (and
planar maps can be mapped to the sphere; if only
because it is important to understand thE spherE

anyway, you were totally & arbitrarily restricting
to 4-valent vertices (or tetragonal conuntries ... and
that is another reason for approaching spherical trig


Date Subject Author
3/3/14
Read 4 colors problem
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3/3/14
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Brian Q. Hutchings
3/3/14
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3/4/14
Read Re: 4 colors problem
g.resta@iit.cnr.it
3/3/14
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3/4/14
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3/4/14
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g.resta@iit.cnr.it
3/4/14
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3/4/14
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3/4/14
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g.resta@iit.cnr.it
3/4/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/4/14
Read Re: 4 colors problem
stumblin' in
3/4/14
Read Re: 4 colors problem
Port563
3/4/14
Read Re: 4 colors problem
stumblin' in
3/4/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/4/14
Read Re: 4 colors problem
stumblin' in
3/4/14
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3/4/14
Read Re: 4 colors problem
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3/4/14
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3/4/14
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Port563
3/4/14
Read Re: 4 colors problem
stumblin' in
3/4/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/4/14
Read Re: 4 colors problem
stumblin' in
3/4/14
Read Re: 4 colors problem
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3/4/14
Read there should be a noncomputer proof of 4CT, I agree
Brian Q. Hutchings
3/4/14
Read Re: 4 colors problem
g.resta@iit.cnr.it
3/4/14
Read Re: 4 colors problem
stumblin' in
3/4/14
Read Re: 4 colors problem
Port563
3/4/14
Read Re: 4 colors problem
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3/5/14
Read Re: 4 colors problem
stumblin' in
3/5/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/5/14
Read Re: 4 colors problem
stumblin' in
3/5/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/5/14
Read Re: 4 colors problem
quasi
3/5/14
Read Re: 4 colors problem
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3/5/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/5/14
Read Re: 4 colors problem
stumblin' in
3/5/14
Read Re: 4 colors problem
quasi
3/5/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/5/14
Read also, what is the spatial analog
Brian Q. Hutchings
3/5/14
Read Re: 4 colors problem
stumblin' in
3/5/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/5/14
Read Re: 4 colors problem
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3/5/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/5/14
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Virgil
3/5/14
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Virgil
3/5/14
Read Re: 4 colors problem
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3/6/14
Read Re: 4 colors problem
Virgil
3/6/14
Read Re: 4 colors problem
Virgil
3/6/14
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Brian Q. Hutchings
3/6/14
Read Re: 4 colors problem
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3/6/14
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ross.finlayson@gmail.com
3/7/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/7/14
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Robin Chapman
3/6/14
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3/6/14
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3/7/14
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magidin@math.berkeley.edu
3/7/14
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Peter Percival
3/7/14
Read Re: 4 colors problem
Peter Percival
3/6/14
Read Re: 4 colors problem
stumblin' in
3/7/14
Read Re: 4 colors problem
stumblin' in
3/7/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/7/14
Read Re: 4 colors problem
Peter Percival
3/7/14
Read Re: 4 colors problem
Peter Percival
3/7/14
Read Re: 4 colors problem
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3/7/14
Read Re: 4 colors problem
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3/9/14
Read Re: 4 colors problem
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3/9/14
Read Re: 4 colors problem
Peter Percival
3/9/14
Read Re: 4 colors problem
stumblin' in
3/9/14
Read Re: 4 colors problem
magidin@math.berkeley.edu
3/9/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/9/14
Read Re: 4 colors problem
stumblin' in
3/9/14
Read Re: 4 colors problem
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3/11/14
Read Re: 4 colors problem
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3/11/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/13/14
Read Re: 4 colors problem
stumblin' in
3/13/14
Read Re: 4 colors problem
Brian Q. Hutchings
3/13/14
Read Re: 4 colors problem
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