# from the theory of proveit.linear_algebra.addition¶

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.
# import Expression classes needed to build the expression
from proveit import V, a, b
from proveit.linear_algebra import InnerProd
from proveit.logic import And, Equals, InSet
from proveit.numbers import zero

In [2]:
# build up the expression from sub-expressions
expr = And(InSet(a, V), InSet(b, V), Equals(InnerProd(a, b), zero))

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(a \in V\right) \land \left(b \in V\right) \land \left(\left \langle a, b\right \rangle = 0\right)

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',)
In [6]:
# display the expression information
stored_expr.expr_info()

core typesub-expressionsexpression
0Operationoperator: 1
operands: 2
1Literal
2ExprTuple3, 4, 5
3Operationoperator: 7
operands: 6
4Operationoperator: 7
operands: 8
5Operationoperator: 9
operands: 10
6ExprTuple16, 11
7Literal
8ExprTuple17, 11
9Literal
10ExprTuple12, 13
11Variable
12Operationoperator: 14
operands: 15
13Literal
14Literal
15ExprTuple16, 17
16Variable
17Variable