Expression of type ExprArray

from the theory of proveit.core_expr_types.expr_arrays

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 A, B, ExprArray, ExprRange, IndexedVar, Variable, n
from proveit.numbers import one

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
expr = ExprArray(ExprRange(sub_expr1, [IndexedVar(A, sub_expr1), IndexedVar(B, sub_expr1)], one, n))

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())

\begin{array}{cc} 
 A_{1} & B_{1} \\
A_{2} & B_{2} \\
\vdots & \vdots \\
A_{n} & B_{n} \\
\end{array}

stored_expr.style_options()

name	description	default	current value	related methods
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	ExprTuple	1
1	ExprRange	lambda_map: 2 start_index: 3 end_index: 4
2	Lambda	parameter: 11 body: 5
3	Literal
4	Variable
5	ExprTuple	6, 7
6	IndexedVar	variable: 8 index: 11
7	IndexedVar	variable: 9 index: 11
8	Variable
9	Variable
10	ExprTuple	11
11	Variable