[ BlockAxiom
    ( SourcePos
        { sourceName = "test/examples/finite-set-terms.tex"
        , sourceLine = Pos 1
        , sourceColumn = Pos 1
        }
    )
    ( Marker "cons" )
    ( Axiom []
        ( StmtConnected Equivalence
            ( StmtFormula
                ( FormulaChain
                    ( ChainBase
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        ) Positive
                        ( RelationSymbol
                            ( Command "in" )
                        )
                        ( ExprOp
                            [ Just
                                ( Command "cons" )
                            , Just InvisibleBraceL
                            , Nothing
                            , Just InvisibleBraceR
                            , Just InvisibleBraceL
                            , Nothing
                            , Just InvisibleBraceR
                            ]
                            [ ExprVar
                                ( NamedVar "y" )
                            , ExprVar
                                ( NamedVar "X" )
                            ] :| []
                        )
                    )
                )
            )
            ( StmtConnected Disjunction
                ( StmtFormula
                    ( FormulaChain
                        ( ChainBase
                            ( ExprVar
                                ( NamedVar "x" ) :| []
                            ) Positive
                            ( RelationSymbol
                                ( Symbol "=" )
                            )
                            ( ExprVar
                                ( NamedVar "y" ) :| []
                            )
                        )
                    )
                )
                ( StmtFormula
                    ( FormulaChain
                        ( ChainBase
                            ( ExprVar
                                ( NamedVar "x" ) :| []
                            ) Positive
                            ( RelationSymbol
                                ( Command "in" )
                            )
                            ( ExprVar
                                ( NamedVar "X" ) :| []
                            )
                        )
                    )
                )
            )
        )
    )
, BlockDefn
    ( SourcePos
        { sourceName = "test/examples/finite-set-terms.tex"
        , sourceLine = Pos 5
        , sourceColumn = Pos 1
        }
    )
    ( Marker "unit" )
    ( DefnOp
        ( SymbolPattern
            [ Just
                ( Command "unit" )
            ] []
        )
        ( ExprFiniteSet
            ( ExprOp
                [ Just
                    ( Command "emptyset" )
                ] [] :| []
            )
        )
    )
, BlockLemma
    ( SourcePos
        { sourceName = "test/examples/finite-set-terms.tex"
        , sourceLine = Pos 9
        , sourceColumn = Pos 1
        }
    )
    ( Marker "emptyset_in_unit" )
    ( Lemma []
        ( StmtFormula
            ( FormulaChain
                ( ChainBase
                    ( ExprOp
                        [ Just
                            ( Command "emptyset" )
                        ] [] :| []
                    ) Positive
                    ( RelationSymbol
                        ( Command "in" )
                    )
                    ( ExprOp
                        [ Just
                            ( Command "unit" )
                        ] [] :| []
                    )
                )
            )
        )
    )
]