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Expression of type Equals

from the theory of proveit.physics.quantum.QPE

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 import e, m
from proveit.logic import Equals, Not, TRUE
from proveit.numbers import LessEq, ModAbs, greater, subtract
from proveit.physics.quantum.QPE import _b_floor, _two_pow_t
In [2]:
# build up the expression from sub-expressions
sub_expr1 = ModAbs(subtract(m, _b_floor), _two_pow_t)
expr = Equals(Equals(LessEq(sub_expr1, e), Not(greater(sub_expr1, e))), TRUE)
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())
\left(\left(\left|m - b_{\textit{f}}\right|_{\textup{mod}\thinspace 2^{t}} \leq e\right) = (\lnot \left(\left|m - b_{\textit{f}}\right|_{\textup{mod}\thinspace 2^{t}} > e\right))\right) = \top
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.()()('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: 4
operands: 1
1ExprTuple2, 3
2Operationoperator: 4
operands: 5
3Literal
4Literal
5ExprTuple6, 7
6Operationoperator: 8
operands: 9
7Operationoperator: 10
operand: 12
8Literal
9ExprTuple16, 15
10Literal
11ExprTuple12
12Operationoperator: 13
operands: 14
13Literal
14ExprTuple15, 16
15Variable
16Operationoperator: 17
operands: 18
17Literal
18ExprTuple19, 20
19Operationoperator: 21
operands: 22
20Operationoperator: 23
operands: 24
21Literal
22ExprTuple25, 26
23Literal
24ExprTuple27, 28
25Variable
26Operationoperator: 29
operand: 31
27Literal
28Literal
29Literal
30ExprTuple31
31Literal