Every planar map is four colorable
I tiakina i:
| Ngā kaituhi matua: | , |
|---|---|
| Hōputu: | Pukapuka |
| Reo: | Ingarihi |
| I whakaputaina: |
Providence
American Mathematical Society
1989
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| Rangatū: | Contemporary mathematics, 98
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| Ngā marau: | |
| Ngā Tūtohu: |
Tāpirihia he Tūtohu
Kāore He Tūtohu, Me noho koe te mea tuatahi ki te tūtohu i tēnei pūkete!
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Me noho koe te mea tuatahi ki te waiho tākupu!