Standout Papers

Every planar map is four colorable 1976 2026 1992 2009 495
  1. Every planar map is four colorable (1976)
    K. I. Appel, Wolfgang Haken Bulletin of the American Mathematical Society
  2. Every planar map is four colorable. Part I: Discharging (1977)
    K. I. Appel, Wolfgang Haken Illinois Journal of Mathematics

Immediate Impact

3 by Nobel laureates 20 from Science/Nature 68 standout
Sub-graph 1 of 25

Citing Papers

Long-range interacting quantum systems
2023 Standout
Bacterial defences: mechanisms, evolution and antimicrobial resistance
2023 Standout
2 intermediate papers

Works of K. I. Appel being referenced

Every planar map is four colorable. Part I: Discharging
1977 Standout
Every planar map is four colorable. Part II: Reducibility
1977

Author Peers

Author Last Decade Papers Cites
K. I. Appel 259 980 117 386 24 1.6k
Wolfgang Haken 390 1076 189 460 18 1.8k
Gerhard Ringel 350 875 54 406 46 1.3k
Gil Kalai 480 908 295 749 70 1.9k
Gábor Tardos 195 828 97 407 89 1.3k
C. St. J. A. Nash‐Williams 613 1290 147 455 42 1.7k
Henry Crapo 327 447 154 459 45 1.2k
Lowell W. Beineke 538 1345 62 490 78 1.9k
Ivan Rival 314 1038 65 204 120 1.5k
Joel Friedman 373 481 215 246 65 1.3k
Reinhard Diestel 497 945 130 351 90 1.5k

All Works

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Rankless by CCL
2026