Overall THF Statistics
----------------------
Domains                     18
Abstract problems         2241
Problems                  2892
Problems with equality    2131 (73%)
Theorem/Unsatisfiable     2289 (79%)
CounterSat/Satisfiable     337 (11%)

Problem-by-problem                 Min      Max      Avg      Med
------------------                 ------------------------------
Number of formulae                   1      749       66        9
% of unit formulae                  0%      99%      24%      22%
Number of atoms                      2     7624      625       90
% of equality atoms                 0%      33%       5%       6%
  in problems with equality         1%      33%       7%       7%
% of variable atoms                 0%      84%      34%      33%
Avg atoms per formula              1.5    998.0     31.0      8.0
Number of symbols                    1      409       38        8
Number of variables                  0     1189       97       16
          ^                          0      175       17        2
          !                          0     1067       73        8
          ?                          0       64        6        2
Number of connectives                0     4591      339       46
Number of type connectives           0      477       55       10
Maximal formula depth                2      359       36       11
Average formula depth                2      350       10        6

The TPTP Domain Structure
-------------------------
The domain structure of the TPTP is depicted below,  with counts of the numbers
of THF  problems and versions in each domain.  The prefixes name subdirectories 
in the Problems directory, and prefix the problem names in that directory.

                                                     Domain  # Problems
     Field             Subfield                      Prefix  Abst / Vers
 -----------------------------------------------------------------------

 |-- Logic --------|-- Combinatory Logic                COL     0 /    0
 |                 |-- Logic Calculi                    LCL   123 /  123
 |                 |-- Henkin Models                    HEN     0 /    0
 |
 |-- Mathematics --|-- Set Theory                       SET   111 /  127
 |                 |-- Set Theory Continued             SEU   545 /  860
 |                 |-- Set Theory Continued             SEV   421 /  421
 |                 |-- Graph Theory                     GRA    48 /   93
 |                 |-- Algebra --|-- Relation Algebra   REL     0 /    0
 |                 |             |-- Boolean Algebra    BOO     0 /    0
 |                 |             |-- Robbins Algebra    ROB     0 /    0
 |                 |             |-- Left Distributive  LDA     0 /    0
 |                 |             |-- Lattices           LAT     0 /    0
 |                 |             |-- Quantales          QUA    20 /   20
 |                 |             |-- Kleene Algebra     KLE     0 /    0
 |                 |             |-- Groups             GRP     1 /    1
 |                 |             |-- Rings              RNG     0 /    0
 |                 |             |-- Fields             FLD     0 /    0
 |                 |             |-- Homological Alg    HAL     0 /    0
 |                 |             |-- General Algebra    ALG    53 /   80
 |                 |-- Number Theory                    NUM   209 /  213
 |                 |-- Topology                         TOP     0 /    0
 |                 |-- Analysis                         ANA     0 /    0
 |                 |-- Geometry                         GEO     0 /    0
 |                 |-- Category Theory                  CAT     1 /    1
 |
 |-- Computer -----|-- Computing Theory                 COM     1 /    1
 |   Science       |-- Knowledge Representation         KRS     0 /    0
 |                 |-- Natural Language Processing      NLP     0 /    0
 |                 |-- Planning                         PLA     0 /    0
 |                 |-- Agents                           AGT     0 /    0
 |                 |-- Commonsense Reasoning            CSR    34 /   74
 |                 |-- Software Creation                SWC     0 /    0
 |                 |-- Software Verification            SWV    23 /   37
 |
 |-- Science and --|-- Hardware Creation                HWC     0 /    0
 |   Engineering   |-- Hardware Verification            HWV     0 /    0
 |                 |-- Medicine                         MED     0 /    0
 |                 |-- Processes                        PRO     0 /    0
 |
 |-- Social -------|-- Social Choice Theory             SCT     0 /    0
 |   Sciences      |-- Management                       MGT     0 /    0
 |                 |-- Geography                        GEG    19 /   19
 |
 |-- Other --------|-- Syntactic                        SYN    63 /   72
                   |-- Syntactic Continued              SYO   518 /  697
                   |-- Puzzles                          PUZ    49 /   51
                   |-- Miscellaneous                    MSC     2 /    2

