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Merged
loisdelamar merged 3 commits into from
Jan 15, 2026
Merged

Update fuse_1_FE_rule.py #1

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8f1bfa2
Update fuse_1_FE_rule.py
loisdelamar Jan 15, 2026
55a6772
Check_fuse_1 update
loisdelamar Jan 15, 2026
bf52e6f
Check_fuse_1 update
loisdelamar Jan 15, 2026
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4 changes: 2 additions & 2 deletions pyzx/ft_simplify.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@
"""This file is structured the same way as `simplify.py`, but instead contains
simplifications with using only fault-equivalent rewrites"""

from pyzx.rewrite import RewriteSimpSingleVertex
from pyzx.rewrite import RewriteSimpSingleVertex, RewriteSimpDoubleVertex
from pyzx.rewrite_rules.fuse_1_FE_rule import *
from pyzx.rewrite_rules.unfuse_FE_rules import *
from pyzx.rewrite_rules.remove_id_rule import *
Expand All @@ -26,7 +26,7 @@
elim_FE_simp = RewriteSimpSingleVertex(check_remove_id, unsafe_remove_id)
"""Performs an Elim rewrite. Can be run automatically on the entire graph."""

fuse_1_FE_simp = RewriteSimpSingleVertex(check_fuse_1_FE, unsafe_fuse_1_FE)
fuse_1_FE_simp = RewriteSimpDoubleVertex(check_fuse_1_FE, unsafe_fuse_1_FE)
"""Performs a Fuse-1 rewrite. Can be run automatically on the entire graph."""

unfuse_1_FE_simp = RewriteSimpSingleVertex(check_unfuse_1_FE, unsafe_unfuse_1_FE)
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20 changes: 13 additions & 7 deletions pyzx/rewrite_rules/fuse_1_FE_rule.py
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Expand Up @@ -55,21 +55,27 @@
fuse as _fuse,
)
from pyzx.utils import is_pauli, VertexType
from pyzx.rewrite_rules.fuse_rule import check_fuse


def check_fuse_1_FE(g: BaseGraph[VT, ET], v: VT) -> bool:
def check_fuse_1_FE(g: BaseGraph[VT, ET], v: VT, w: VT) -> bool:
neighs = g.neighbors(v)
return len(neighs) == 1 and g.type(neighs[0]) == g.type(v) and is_pauli(g.phase(v))
return len(neighs) == 1 and check_fuse(g, v, w) and is_pauli(g.phase(v))


def fuse_1_FE(g: BaseGraph[VT, ET], v: VT) -> bool:
if not check_fuse_1_FE(g, v):
#def check_fuse_1_FE(g: BaseGraph[VT, ET], v: VT) -> bool:
#neighs = g.neighbors(v)
#return len(neighs) == 1 and g.type(neighs[0]) == g.type(v) and is_pauli(g.phase(v))


def fuse_1_FE(g: BaseGraph[VT, ET], v: VT, w: VT) -> bool:
if not check_fuse_1_FE(g, v, w):
return False
return unsafe_fuse_1_FE(g, v)
return unsafe_fuse_1_FE(g, v, w)


def unsafe_fuse_1_FE(g: BaseGraph[VT, ET], v: VT) -> bool:
if not check_fuse_1_FE(g, v):
def unsafe_fuse_1_FE(g: BaseGraph[VT, ET], v: VT, w: VT) -> bool:
if not check_fuse_1_FE(g, v, w):
return False
[v2] = g.neighbors(v)
return _fuse(g, v, v2)
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