Theorem membership_folding of type Forall

from the theory of proveit.logic.sets.functions.bijections

see dependencies

import proveit
# Automation is not needed when only building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_theorem_expr # Load the stored theorem expression as 'stored_expr'
# import the special expression
from proveit.logic.sets.functions.bijections import membership_folding

# check that the built expression is the same as the stored expression
assert membership_folding.expr == stored_expr
assert membership_folding.expr._style_id == stored_expr._style_id
print("Passed sanity check: membership_folding matches stored_expr")

Passed sanity check: membership_folding matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\forall_{A, B}~\left[\forall_{f \in \left[A \xrightarrow[]{\text{1-to-1}} B\right]~|~f \in \left[A \xrightarrow[\text{onto}]{} B\right]}~\left(f \in \left[A \xrightarrow[\text{onto}]{\text{1-to-1}} B\right]\right)\right]

stored_expr.style_options()

name	description	default	current value	related methods
with_wrapping	If 'True', wrap the Expression after the parameters	None	None/False	('with_wrapping',)
condition_wrapping	Wrap 'before' or 'after' the condition (or None).	None	None/False	('with_wrap_after_condition', 'with_wrap_before_condition')
wrap_params	If 'True', wraps every two parameters AND wraps the Expression after the parameters	None	None/False	('with_params',)
justification	justify to the 'left', 'center', or 'right' in the array cells	center	center	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Operation	operator: 4 operand: 2
1	ExprTuple	2
2	Lambda	parameters: 26 body: 3
3	Operation	operator: 4 operand: 6
4	Literal
5	ExprTuple	6
6	Lambda	parameter: 22 body: 8
7	ExprTuple	22
8	Conditional	value: 9 condition: 10
9	Operation	operator: 19 operands: 11
10	Operation	operator: 12 operands: 13
11	ExprTuple	22, 14
12	Literal
13	ExprTuple	15, 16
14	Operation	operator: 17 operands: 26
15	Operation	operator: 19 operands: 18
16	Operation	operator: 19 operands: 20
17	Literal
18	ExprTuple	22, 21
19	Literal
20	ExprTuple	22, 23
21	Operation	operator: 24 operands: 26
22	Variable
23	Operation	operator: 25 operands: 26
24	Literal
25	Literal
26	ExprTuple	27, 28
27	Variable
28	Variable