Expression of type ExprTuple

from the theory of proveit.core_expr_types.tuples

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 import ExprTuple, Lambda, f, i
from proveit.core_expr_types import Len, f_1_to_i
from proveit.logic import Equals

# build up the expression from sub-expressions
expr = ExprTuple(Lambda(f, Equals(Len(operands = [f_1_to_i]), i)))

expr:

# 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

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

\left(f \mapsto \left(|\left(f\left(1\right), f\left(2\right), \ldots, f\left(i\right)\right)| = i\right)\right)

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1
1	Lambda	parameter: 14 body: 3
2	ExprTuple	14
3	Operation	operator: 4 operands: 5
4	Literal
5	ExprTuple	6, 12
6	Operation	operator: 7 operands: 8
7	Literal
8	ExprTuple	9
9	ExprRange	lambda_map: 10 start_index: 11 end_index: 12
10	Lambda	parameter: 16 body: 13
11	Literal
12	Variable
13	Operation	operator: 14 operand: 16
14	Variable
15	ExprTuple	16
16	Variable