Overall THF Statistics
----------------------
Domains                     18
Abstract problems         2143
Problems                  2798
Problems with equality    2088 (74%)
Theorem/Unsatisfiable     2209 (78%)
CounterSat/Satisfiable     343 (12%)

Problem-by-problem                 Min      Max      Avg      Med
------------------                 ------------------------------
Number of formulae                   1      749       67        9
% of unit formulae                  0%      99%      23%      20%
% of type formulae                  0%      99%      52%      53%
% of defn formulae                  0%       0%      21%      46%
Number of atoms                      2     7624      638       93
% 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     31.5      8.0
Number of symbols                    1      409       39        8
Number of variables                  0     1189       99       16
          ^                          0      175       17        2
          !                          0     1067       75        8
          ?                          0       64        6        2
Number of connectives                0     4591      347       46
Number of type connectives           0      477       55       11
Maximal formula depth                2      359       37       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   121 /  122
 |                 |-- Henkin Models                    HEN     0 /    0
 |
 |-- Mathematics --|-- Set Theory                       SET   111 /  130
 |                 |-- Set Theory Continued             SEU   539 /  852
 |                 |-- Set Theory Continued             SEV   394 /  402
 |                 |-- 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 /   78
 |                 |-- Number Theory                    NUM   173 /  179
 |                 |-- 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
 |                 |-- Data Structures                  DAT     0 /    0
 |                 |-- Software Creation                SWC     0 /    0
 |                 |-- Software Verification            SWV    23 /   37
 |                 |-- Software Verification Continued  SWW     0 /    0
 |
 |-- 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    18 /   18
 |
 |-- Other --------|-- Arithmetic                       ARI     0 /    0
                   |-- Syntactic                        SYN    62 /   72
                   |-- Syntactic Continued              SYO   494 /  666
                   |-- Puzzles                          PUZ    48 /   50
                   |-- Miscellaneous                    MSC     2 /    2

