Expression of type Lambda

from the theory of proveit.numbers.rounding

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 Conditional, Lambda, x, y
from proveit.logic import And, InSet
from proveit.numbers import Add, Ceil, Real, greater_eq, one, subtract

# build up the expression from sub-expressions
expr = Lambda([x, y], Conditional(greater_eq(Ceil(Add(x, y)), subtract(Add(Ceil(x), Ceil(y)), one)), And(InSet(x, Real), InSet(y, Real))))

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(x, y\right) \mapsto \left\{\left\lceil x + y\right\rceil \geq \left(\left(\left\lceil x\right\rceil + \left\lceil y\right\rceil\right) - 1\right) \textrm{ if } x \in \mathbb{R} ,  y \in \mathbb{R}\right..

stored_expr.style_options()

no style options

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	Lambda	parameters: 25 body: 1
1	Conditional	value: 2 condition: 3
2	Operation	operator: 4 operands: 5
3	Operation	operator: 6 operands: 7
4	Literal
5	ExprTuple	8, 9
6	Literal
7	ExprTuple	10, 11
8	Operation	operator: 24 operands: 12
9	Operation	operator: 30 operand: 19
10	Operation	operator: 15 operands: 14
11	Operation	operator: 15 operands: 16
12	ExprTuple	17, 18
13	ExprTuple	19
14	ExprTuple	32, 20
15	Literal
16	ExprTuple	33, 20
17	Operation	operator: 24 operands: 21
18	Operation	operator: 22 operand: 28
19	Operation	operator: 24 operands: 25
20	Literal
21	ExprTuple	26, 27
22	Literal
23	ExprTuple	28
24	Literal
25	ExprTuple	32, 33
26	Operation	operator: 30 operand: 32
27	Operation	operator: 30 operand: 33
28	Literal
29	ExprTuple	32
30	Literal
31	ExprTuple	33
32	Variable
33	Variable