Difference between revisions of "Complexity Zoo"

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==Introduction==
 
==Introduction==
  
Welcome to the '''Complexity Zoo'''... There are now 507 classes and counting!
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Welcome to the '''Complexity Zoo'''... There are now 545 classes and counting!
 
[[Image:zoo.gif|thumb|right|200px|what's your problem?]]
 
[[Image:zoo.gif|thumb|right|200px|what's your problem?]]
  
 
{{CZ-Menu-Content}}
 
{{CZ-Menu-Content}}
 
This information was originally moved from http://www.complexityzoo.com/ in August 2005, and is currently under the watchful eyes of its original creators:
 
  
 
; Zookeeper : [http://www.scottaaronson.com/ Scott Aaronson]
 
; Zookeeper : [http://www.scottaaronson.com/ Scott Aaronson]
 
; Veterinarian : [http://www.math.ucdavis.edu/~greg/ Greg Kuperberg]
 
; Veterinarian : [http://www.math.ucdavis.edu/~greg/ Greg Kuperberg]
; Tour Guide : [https://sites.google.com/site/cgranade/ Christopher Granade]
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; Zoo Conservationist : [https://www.linkedin.com/in/oliver-habryka-8a585297 Oliver Habryka] on behalf of the [https://www.lesswrong.com/ LessWrong] community
 
 
In 2012, this content was moved again to the University of Waterloo and is maintained there by
 
  
; Zoo Conservationist : [https://cs.uwaterloo.ca/~vrusso/ Vincent Russo]
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The Zoo first opened in 2002. It was made into a wiki in 2005, and hosted at the University of Waterloo from 2012 to 2020.
  
 
Errors?  Omissions?  Misattributions?  Your favorite class not here?  Then please contribute to the zoo as you see fit by [[Special:UserLogin | signing up]] and clicking on the edit links.  Please include references, or better yet links to papers if available.
 
Errors?  Omissions?  Misattributions?  Your favorite class not here?  Then please contribute to the zoo as you see fit by [[Special:UserLogin | signing up]] and clicking on the edit links.  Please include references, or better yet links to papers if available.
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''Other Collections and Resources''
 
''Other Collections and Resources''
 
* [[Complexity Garden]]: Problems of interest in complexity theory and some notes about important inclusions.
 
* [[Complexity Garden]]: Problems of interest in complexity theory and some notes about important inclusions.
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* [[Complexity Dojo]]: A collection of major theorems in complexity theory.
 
* [[Zoo Exhibit|Special Exhibit]]: A collection of classes of quantum states and probability distributions.
 
* [[Zoo Exhibit|Special Exhibit]]: A collection of classes of quantum states and probability distributions.
 
* [http://www.math.ucdavis.edu/~greg/zoology/intro.html Complexity Zoology]: A computer-assisted survey maintained by the [http://www.math.ucdavis.edu/~greg/ Greg Kuperberg], including [http://www.math.ucdavis.edu/~greg/zoology/diagram.xml active] and [http://www.math.ucdavis.edu/~greg/zoology/diagram.pdf static] inclusion diagrams.
 
* [http://www.math.ucdavis.edu/~greg/zoology/intro.html Complexity Zoology]: A computer-assisted survey maintained by the [http://www.math.ucdavis.edu/~greg/ Greg Kuperberg], including [http://www.math.ucdavis.edu/~greg/zoology/diagram.xml active] and [http://www.math.ucdavis.edu/~greg/zoology/diagram.pdf static] inclusion diagrams.

Latest revision as of 02:46, 3 December 2020


Introduction

Welcome to the Complexity Zoo... There are now 545 classes and counting!

what's your problem?

Complexity classes by letter: Symbols - A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

Lists of related classes: Communication Complexity - Hierarchies - Nonuniform

Zookeeper
Scott Aaronson
Veterinarian
Greg Kuperberg
Zoo Conservationist
Oliver Habryka on behalf of the LessWrong community

The Zoo first opened in 2002. It was made into a wiki in 2005, and hosted at the University of Waterloo from 2012 to 2020.

Errors? Omissions? Misattributions? Your favorite class not here? Then please contribute to the zoo as you see fit by signing up and clicking on the edit links. Please include references, or better yet links to papers if available.

To create a new class, click on the edit link of the class before or after the one that you want to add and copy the format of that class. (The classes are alphabetized by their tag names.) Then add the class to the table of contents and increment the total number of classes. After this, you can use the side edit links to edit the individual sections. For more on using the wiki language, see our simple wiki help page.

If you would like to contribute but feel unable to make the updates yourself, email the zookeeper at scott at scottaaronson.com.

See Also

Introductory Resources

  • Introductory Essay: New visitors may want to stop here and see what the Zoo is all about.
  • Petting Zoo: A more gentle version of the Zoo with fewer classes, meant for new initiates in complexity. (If you're looking for where the Most Important Classes went, look in the Petting Zoo.)

Other Collections and Resources

Appendices

NB: Longtime Zoo watchers may recall Chris Bourke's LaTeX version of the Zoo and Chad Brewbaker's graphical inclusion diagram. These references are obsolete until further notice.


All Classes

Complexity classes by letter: Symbols - A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

Lists of related classes: Communication Complexity - Hierarchies - Nonuniform

Symbols

0-1-NPC - 1NAuxPDAp - 2-EXP - 3SUM-hard - #AC0 - #L - #L/poly - #GA - #P - #W[t] - ⊕EXP - ⊕L - ⊕L/poly - ⊕P - ⊕Pcc - ⊕SAC0 - ⊕SAC1

A

A0PP - AC - AC0 - AC0[m] - AC1 - ACC0 - AH - AL - ALL - ALOGTIME - AlgP/poly - Almost-NP - Almost-P - Almost-PSPACE - AM - AMcc - AMEXP - AM ∩ coAM - AM[polylog] - AmpMP - AmpP-BQP - AP - APP - APSPACE - APX - ASPACE - ATIME - AUC-SPACE(f(n)) - AuxPDA - AVBPP - AvgE - AvgP - AW[P] - AWPP - AW[SAT] - AW[*] - AW[t] - AxP - AxPP

B

βP - BC=P - BH - BPd(P) - BPE - BPEE - BPHSPACE(f(n)) - BPL - BP•NP - BPP - BPPcc - BPPcc - BPPKT - BPP/log - BPP/mlog - BPP//log - BPP/rlog - BPP-OBDD - BPPpath - BPQP - BPSPACE(f(n)) - BPTIME(f(n)) - BQNC - BQNP - BQP - BQP/log - BQP/poly - BQP/mlog - BQP/mpoly - BQP/qlog - BQP/qpoly - BQP-OBDD - BQPSPACE - BQPCTC - BQPtt/poly - BQTIME(f(n)) - k-BWBP

C

C=AC0 - C=L - C=P - CC - CC0 - CFL - CLOG - CH - Check - CL#P - CkP - CNP - coAM - coC=P - cofrIP - Coh - coMA - coModkP - compIP - compNP - coNE - coNEXP - coNL - coNP - coNPcc - coNP/poly - coNQP - coRE - coRNC - coRP - coSL - coSPARSE - coUCC - coUP - CP - cq-Σ2 - CSIZE(f(n)) - CSL - CSP - CZK

D

D#P - DCFL - Δ2P - δ-BPP - δ-RP - DET - DiffAC0 - DisNP - DistNP - DP - DQC1 - DQP - DSPACE(f(n)) - DTIME(f(n)) - DTISP(t(n),s(n)) - Dyn-FO - Dyn-ThC0

E

E - EE - EEE - EESPACE - EEXP - EH - ELEMENTARY - ELkP - EP - EPTAS - k-EQBP - EQP - EQPK - EQTIME(f(n)) - ESPACE - ∃BPP - ∃NISZK - EXP - EXP/poly - EXPSPACE

F

FBQP - FERT - FPERT - Few - FewEXP - FewP - FH - FIXP - FNL - FNL/poly - FNP - FO - FO(DTC) - FO(LFP) - FO(PFP) - FO(TC) - FO() - FOLL - FP - FPNP[log] - FPL - FPR - FPRAS - FPT - FPTnu - FPTsu - FPTAS - FQMA - frIP - F-TAPE(f(n)) - F-TIME(f(n))

G

GA - GAN-SPACE(f(n)) - GapAC0 - GapL - GapP - GC(s(n),C) - GCSL - GI - GLO - GPCD(r(n),q(n)) - G[t]

H

HalfP - HeurBPP - HeurBPTIME(f(n)) - HeurDTIME(f(n)) - HeurP - HeurPP - HeurNTIME(f(n)) - HkP - HVSZK

I

IC[log,poly] - IP - IPP - IP[polylog]

L

L - LC0 - LH - LIN - LkP - LOGCFL - LogFew - LogFewNL - LOGLOG - LOGNP - LOGSNP - L/poly - LWPP

M

MA - MAcc - MA' - MAC0 - MAE - MAEXP - mAL - MAPOLYLOG - MaxNP - MaxPB - MaxSNP - MaxSNP0 - mcoNL - MinPB - MIP - MIP* - MIPns - MIPEXP - (Mk)P - mL - MM - MMSNP - mNC1 - mNL - mNP - ModkL - ModL - ModkP - ModP - ModZkL - mP - MP - MPC - mP/poly - mTC0

N

NAuxPDAp - NC - NC0 - NC1 - NC2 - NE - NE/poly - Nearly-P - NEE - NEEE - NEEXP - NEXP - NEXP/poly - NIPZK - NIQSZK - NISZK - NISZKh - NL - NL/poly - NLIN - NLO - NLOG - NMCL - NONE - NNC(f(n)) - NP - NPC - NPC - NPcc - NPcc - NPI - NP ∩ coNP - (NP ∩ coNP)/poly - NP/log - NPMV - NPMV-sel - NPMVt - NPMVt-sel - NPO - NPOPB - NP/poly - (NP,P-samplable) - NPR - NPSPACE - NPSV - NPSV-sel - NPSVt - NPSVt-sel - NQL - NQL - NQP - NSPACE(f(n)) - NT - NT* - NTIME(f(n))

O

OptP

P

P - P/log - P/poly - P#P - P#P[1] - PCTC - PAC0 - PBP - k-PBP - PC - Pcc - Pcc - PCD(r(n),q(n)) - P-Close - PCP(r(n),q(n)) - PDQP - PermUP - PEXP - PF - PFCHK(t(n)) - PH - PHcc - Φ2P - PhP - Π2P - PINC - PIO - PK - PKC - PL - PL1 - PL - PLF - PLL - PLS - PNP - PNPcc - P||NP - PNP[k] - PNP[log] - PNP[log^2] - P-OBDD - PODN - polyL - PostBPP - PostBPPcc - PostBQP - PP - PPcc - PP/poly - PPA - PPAD - PPADS - PPP - PPP - PPSPACE - PQMA[log] - PQUERY - PR - PR - PrHSPACE(f(n)) - PromiseBPP - PromiseBQP - PromiseP - PromiseRP - PromiseUP - PrSPACE(f(n)) - P-Sel - PSK - PSPACE - PSPACEcc - PSPACE/poly - PT1 - PTAPE - PTAS - PT/WK(f(n),g(n)) - PZK

Q

Q - QAC0 - QAC0[m] - QACC0 - QACf0 - QAM - QCFL - QCMA - QCPH - QH - QIP - QIP[2] - QL - QMA - QMA-plus - QMA(2) - QMA1 - QMAlog - QMAM - QMA/qpoly - QMIP - QMIPle - QMIPne - QNC - QNC0 - QNCf0 - QNC1 - QP - QPH - QPLIN - QPSPACE - QRG - QRG(k) - QRG(2) - QRG(1) - QRL - QSZK

R

R - RBQP - RE - REG - RevSPACE(f(n)) - RG - RG[1] - RHL - RHSPACE(f(n)) - RL - RNC - RP - RPcc - RPcc - RPP - RQP - RSPACE(f(n))

S

S - S2P - S2-EXP•PNP - SAC - SAC0 - SAC1 - SAPTIME - SBP - SBPcc - SBQP - SC - SE - SEH - SelfNP - SFk - Σ2P - SKC - SL - SLICEWISE PSPACE - SNP - SO - SO(Horn) - SO(Krom) - SO(LFP) - SO(TC) - SO[] - SP - span-L - span-P - SPARSE - SPL - SPP - SQG - SUBEXP - symP - SZK - SZKh

T

TALLY - TC0 - TFNP - Θ2P - TI - Tower - TreeBQP - TREE-REGULAR

U

UAMcc - UAP - UCC - UCFL - UE - UL - UL/poly - UP - UPcc - UPostBPPcc - UPPcc - US - USBPcc - UWAPPcc

V

VCk - VCOR - VNCk - VNPk - VPk - VPL - VQPk

W

W[1] - WAPP - WAPPcc - WHILE - W[P] - WPP - W[SAT] - W[*] - W[t] - W*[t]

X

XOR-MIP*[2,1] - XL - XNL - XP - XPuniform

Y

YACC - YP - YPP - YQP

Z

ZAMcc - ZBQP - ZK - ZPE - ZPP - ZPPcc - ZPTIME(f(n)) - ZQP