<commit_before>from typing import List
from ddq.fol.constant import Constant
from ddq.axiom import Axiom, Node
from ddq.builder import VarBuilder
from ddq.fol.variable import universal_var, var
from ddq.fol.quantifier import forall
from ddq.fol.natural_deduction.import_all import *
from .membership import st_in


class EmptySetConstant(Constant):
    def __init__(self):
        super().__init__("∅")

    def notes(self) -> List[str]:
        return ["Not essential, but very common and convenient"]

<commit_msg>Adding FOL and ST topic<commit_after>from typing import List
from ddq.fol.constant import Constant
from ddq.axiom import Axiom, Node
from ddq.builder import VarBuilder
from ddq.fol.variable import universal_var, var
from ddq.fol.quantifier import forall
from ddq.fol.natural_deduction.import_all import l_not
from .membership import st_in


class EmptySetConstant(Constant):
    def __init__(self):
        super().__init__("∅")

    def notes(self) -> List[str]:
        return ["Not essential, but very common and convenient"]


{'fraction_non_alphanumeric': 0.08317399617590822, 'fraction_numerical': 0.0, 'mean_word_length': 4.481675392670157, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 5, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5313885', 'n_tokens_mistral': 331, 'n_tokens_neox': 308, 'n_words': 103}