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Fixed unused_gens for zero polynomial by oscarbenjamin · Pull Request #370 · flintlib/python-flint · GitHub

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Fixed unused_gens for zero polynomial #370

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oscarbenjamin merged 2 commits into from
Feb 17, 2026
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Fixed unused_gens for zero polynomial #370

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d2e5d84
Fixed unused_gens for zero polynomial
oscarbenjamin Feb 17, 2026
bab5ea5
Fix type annotation for mpoly.names
oscarbenjamin Feb 17, 2026
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2 changes: 1 addition & 1 deletion src/flint/flint_base/flint_base.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -173,7 +173,7 @@ class flint_mpoly_context(flint_elem, Generic[Tmpoly, Telem, Telem_coerce]):
def from_dict(self, d: Mapping[tuple[int, ...], Telem_coerce], /) -> Tmpoly: ...
def constant(self, z: Telem_coerce, /) -> Tmpoly: ...
def name(self, i: int, /) -> str: ...
def names(self) -> tuple[str]: ...
def names(self) -> tuple[str, ...]: ...
def gens(self) -> tuple[Tmpoly, ...]: ...
def variable_to_index(self, var: str, /) -> int: ...
def term(
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2 changes: 1 addition & 1 deletion src/flint/flint_base/flint_base.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -959,7 +959,7 @@ cdef class flint_mpoly(flint_elem):
('x0', 'x3')
"""
names = self.context().names()
return tuple(names[i] for i, x in enumerate(self.degrees()) if not x)
return tuple(names[i] for i, x in enumerate(self.degrees()) if x <= 0)

def project_to_context(self, other_ctx, mapping: dict[str | int, str | int] = None):
"""
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2 changes: 2 additions & 0 deletions src/flint/test/test_all.py
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Expand Up @@ -3267,6 +3267,8 @@ def quick_poly():
)
new_poly = quick_poly().project_to_context(ctx1)
assert ctx1.drop_gens(new_poly.unused_gens()) == ctx
assert quick_poly().unused_gens() == ()
assert (0*quick_poly()).unused_gens() == ('x0', 'x1')
assert new_poly.project_to_context(ctx) == quick_poly()

new_poly = quick_poly().project_to_context(ctx2)
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2 changes: 1 addition & 1 deletion src/flint/types/fmpq_mpoly.pyi
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Expand Up @@ -24,7 +24,7 @@ class fmpq_mpoly_ctx(flint_mpoly_context[fmpq_mpoly, fmpq, ifmpq]):
def from_dict(self, d: Mapping[tuple[int, ...], ifmpq], /) -> fmpq_mpoly: ...
def constant(self, q: ifmpq, /) -> fmpq_mpoly: ...
def name(self, i: int, /) -> str: ...
def names(self) -> tuple[str]: ...
def names(self) -> tuple[str, ...]: ...
def gens(self) -> tuple[fmpq_mpoly, ...]: ...
def variable_to_index(self, var: str, /) -> int: ...
def term(
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2 changes: 1 addition & 1 deletion src/flint/types/fmpz_mod_mpoly.pyi
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Expand Up @@ -36,7 +36,7 @@ class fmpz_mod_mpoly_ctx(flint_mod_mpoly_context[fmpz_mod_mpoly, fmpz_mod, ifmpz
def constant(self, z: ifmpz_mod) -> fmpz_mod_mpoly: ...

def name(self, i: int, /) -> str: ...
def names(self) -> tuple[str]: ...
def names(self) -> tuple[str, ...]: ...
def gens(self) -> tuple[fmpz_mod_mpoly, ...]: ...
def variable_to_index(self, var: str, /) -> int: ...
def term(
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2 changes: 1 addition & 1 deletion src/flint/types/fmpz_mpoly.pyi
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Expand Up @@ -22,7 +22,7 @@ class fmpz_mpoly_ctx(flint_mpoly_context[fmpz_mpoly, fmpz, ifmpz]):
def from_dict(self, d: Mapping[tuple[int, ...], ifmpz], /) -> fmpz_mpoly: ...
def constant(self, z: ifmpz, /) -> fmpz_mpoly: ...
def name(self, i: int, /) -> str: ...
def names(self) -> tuple[str]: ...
def names(self) -> tuple[str, ...]: ...
def gens(self) -> tuple[fmpz_mpoly, ...]: ...
def variable_to_index(self, var: str, /) -> int: ...
def term(
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2 changes: 1 addition & 1 deletion src/flint/types/nmod_mpoly.pyi
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Expand Up @@ -37,7 +37,7 @@ class nmod_mpoly_ctx(flint_mod_mpoly_context[nmod_mpoly, nmod, inmod]):
def constant(self, z: inmod) -> nmod_mpoly: ...

def name(self, i: int, /) -> str: ...
def names(self) -> tuple[str]: ...
def names(self) -> tuple[str, ...]: ...
def gens(self) -> tuple[nmod_mpoly, ...]: ...
def variable_to_index(self, var: str, /) -> int: ...
def term(
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2 changes: 1 addition & 1 deletion src/flint/typing.py
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Expand Up @@ -243,7 +243,7 @@ def gen(self, i: int, /) -> _Tmpoly_p: ...
def from_dict(self, d: Mapping[tuple[int, ...], _Tscalar_contra | int], /) -> _Tmpoly_p: ...
def constant(self, z: _Tscalar_contra | int, /) -> _Tmpoly_p: ...
def name(self, i: int, /) -> str: ...
def names(self) -> tuple[str]: ...
def names(self) -> tuple[str, ...]: ...
def gens(self) -> tuple[_Tmpoly_p, ...]: ...
def variable_to_index(self, var: str, /) -> int: ...
def term(
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