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Expression of type Equals

from the theory of proveit.logic.sets.enumeration

In [1]:
import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit.logic import And, Equals, FALSE, NotEquals, TRUE
from proveit.numbers import one, three, two
In [2]:
# build up the expression from sub-expressions
expr = Equals(And(NotEquals(two, one), NotEquals(two, two), NotEquals(two, three)), And(TRUE, FALSE, TRUE)).with_wrapping_at(2)
expr:
In [3]:
# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")
Passed sanity check: expr matches stored_expr
In [4]:
# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())
\begin{array}{c} \begin{array}{l} \left(\left(2 \neq 1\right) \land \left(2 \neq 2\right) \land \left(2 \neq 3\right)\right) =  \\ \left(\top \land \bot \land \top\right) \end{array} \end{array}
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
operation'infix' or 'function' style formattinginfixinfix
wrap_positionsposition(s) at which wrapping is to occur; '2 n - 1' is after the nth operand, '2 n' is after the nth operation.()(2)('with_wrapping_at', 'with_wrap_before_operator', 'with_wrap_after_operator', 'without_wrapping', 'wrap_positions')
justificationif any wrap positions are set, justify to the 'left', 'center', or 'right'centercenter('with_justification',)
directionDirection of the relation (normal or reversed)normalnormal('with_direction_reversed', 'is_reversed')
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Operationoperator: 1
operands: 2
1Literal
2ExprTuple3, 4
3Operationoperator: 6
operands: 5
4Operationoperator: 6
operands: 7
5ExprTuple8, 9, 10
6Literal
7ExprTuple12, 11, 12
8Operationoperator: 15
operands: 13
9Operationoperator: 15
operands: 14
10Operationoperator: 15
operands: 16
11Literal
12Literal
13ExprTuple18, 17
14ExprTuple18, 18
15Literal
16ExprTuple18, 19
17Literal
18Literal
19Literal