Documentation Verification Report

Truncated

📁 Source: Mathlib/RingTheory/WittVector/Truncated.lean

Statistics

MetricCount
DefinitionsTruncated, Truncated, Truncated, TruncatedWittVector, coeff, hasIntScalar, hasNatPow, hasNatScalar, instAdd, instCommRing, instFintype, instIntCast, instMul, instNatCast, instNeg, instOne, instSub, instZero, mk, out, truncate, liftEquiv, liftFun, truncate, truncateFun, instInhabitedTruncatedWittVector, witt_truncateFun_tac
27
Theoremscard, coeff_mk, coeff_out, coeff_truncate, coeff_zero, ext, ext_iff, iInf_ker_truncate, mk_coeff, out_injective, truncateFun_out, truncate_comp, truncate_comp_wittVector_truncate, truncate_surjective, truncate_truncate, truncate_wittVector_truncate, coeff_truncate, coeff_truncateFun, hom_ext, liftEquiv_apply, liftEquiv_symm_apply_coe, lift_unique, mem_ker_truncate, out_truncateFun, truncateFun_add, truncateFun_intCast, truncateFun_mul, truncateFun_natCast, truncateFun_neg, truncateFun_nsmul, truncateFun_one, truncateFun_pow, truncateFun_sub, truncateFun_surjective, truncateFun_zero, truncateFun_zsmul, truncate_comp_lift, truncate_lift, truncate_liftFun, truncate_mk', truncate_surjective
41
Total68

CategoryTheory.CosimplicialObject

Definitions

NameCategoryTheorems
Truncated 📖CompOp
8 mathmath: Truncated.whiskering_obj_obj_obj, Truncated.whiskering_map_app_app, Truncated.whiskering_obj_map_app, Truncated.instHasColimits, Truncated.instHasLimitsOfShape, Truncated.instHasColimitsOfShape, Truncated.instHasLimits, Truncated.whiskering_obj_obj_map

CategoryTheory.SimplicialObject

Definitions

NameCategoryTheorems
Truncated 📖CompOp
22 mathmath: Truncated.instHasLimits, Truncated.whiskering_obj_obj_obj, Truncated.whiskering_map_app_app, Truncated.cosk.full, instIsRightKanExtensionOppositeTruncatedSimplexCategoryObjCoskAppTruncatedCounitCoskAdjTruncation, Truncated.instHasColimits, Truncated.cosk.faithful, Truncated.trunc_obj_obj, isoCoskOfIsCoskeletal_hom, Truncated.sk.full, instIsIsoAppUnitTruncatedCoskAdj, Truncated.trunc_obj_map, Truncated.trunc_map_app, Truncated.instHasLimitsOfShape, Truncated.whiskering_obj_obj_map, Truncated.cosk_reflective, Truncated.sk_coreflective, Truncated.sk.faithful, instIsLeftKanExtensionOppositeTruncatedSimplexCategoryObjSkAppTruncatedUnitSkAdjTruncation, isCoskeletal_iff_isIso, Truncated.instHasColimitsOfShape, Truncated.whiskering_obj_map_app

SSet

Definitions

NameCategoryTheorems
Truncated 📖CompOp
88 mathmath: OneTruncation₂.nerveEquiv_apply, Truncated.HomotopyCategory.BinaryProduct.iso_inv_toFunctor, Truncated.tensor_map_apply_snd, oneTruncation₂_obj, OneTruncation₂.ofNerve₂.natIso_hom_app_map, CategoryTheory.nerve.instFullCatTruncatedOfNatNatNerveFunctor₂, Truncated.sk.full, Truncated.HomotopyCategory.descOfTruncation_comp, instIsDiscreteHomotopyCategoryObjTruncatedOfNatNatTruncationSimplexCategoryStdSimplexMk, oneTruncation₂_map, Truncated.Path.mk₂_arrow, Truncated.HomotopyCategory.BinaryProduct.inverse_map_mkHom_id_homMk, OneTruncation₂.nerveHomEquiv_id, CategoryTheory.nerve.functorOfNerveMap_map, Truncated.sk_coreflective, Truncated.Edge.map_fst, Truncated.HomotopyCategory.BinaryProduct.functorCompInverseIso_inv_app, Truncated.HomotopyCategory.BinaryProduct.functorCompInverseIso_hom_app, Edge.ofTruncated_edge, Truncated.HomotopyCategory.BinaryProduct.inverse_comp_mapHomotopyCategory_fst, OneTruncation₂.ofNerve₂.natIso_inv_app_obj_obj, Truncated.Edge.CompStruct.tensor_simplex_snd, Truncated.HomotopyCategory.BinaryProduct.inverse_comp_mapHomotopyCategory_snd, Truncated.Edge.id_tensor_id, CategoryTheory.Nerve.instIsStrictSegalObjCatTruncatedOfNatNatNerveFunctor₂, OneTruncation₂.ofNerve₂.natIso_hom_app_obj, Truncated.id_app, Truncated.HomotopyCategory.BinaryProduct.left_unitality, Truncated.Edge.CompStruct.tensor_simplex_fst, Truncated.hasColimits, Truncated.HomotopyCategory.BinaryProduct.inverseCompFunctorIso_inv_app, Truncated.Edge.map_associator_hom, OneTruncation₂.nerveEquiv_symm_apply_map, Truncated.HomotopyCategory.BinaryProduct.iso_hom_toFunctor, Truncated.Edge.map_whiskerLeft, Truncated.HomotopyCategory.BinaryProduct.inverse_map_mkHom_homMk_id, Truncated.HomotopyCategory.BinaryProduct.mapHomotopyCategory_prod_id_comp_inverse, Truncated.Edge.map_snd, Truncated.HomotopyCategory.BinaryProduct.functor_comp_inverse, Truncated.HomotopyCategory.descOfTruncation_map_homMk, Truncated.HomotopyCategory.BinaryProduct.inverse_map_mkHom_homMk_homMk, Truncated.hoFunctor₂_naturality, Truncated.HomotopyCategory.BinaryProduct.inverse_comp_functor, Truncated.HomotopyCategory.homToNerveMk_app_one, Truncated.comp_app_assoc, Truncated.Edge.map_tensorHom, Truncated.HomotopyCategory.BinaryProduct.associativity'Iso_hom_app, horn.spineId_vertex_coe, Truncated.tensor_map_apply_fst, Truncated.HomotopyCategory.BinaryProduct.functor_obj, horn.spineId_arrow_coe, Truncated.Edge.tensor_edge, Truncated.cosk.faithful, Subcomplex.liftPath_arrow_coe, Truncated.HomotopyCategory.BinaryProduct.square, Truncated.HomotopyCategory.BinaryProduct.inverseCompFunctorIso_hom_app, Truncated.HomotopyCategory.homToNerveMk_app_edge, OneTruncation₂.ofNerve₂.natIso_inv_app_map, Truncated.trunc_spine, Truncated.cosk.full, Truncated.HomotopyCategory.BinaryProduct.associativity, OneTruncation₂.nerveEquiv_symm_apply_obj, Subcomplex.liftPath_vertex_coe, OneTruncation₂.ofNerve₂.natIso_inv_app_obj_map, Truncated.HomotopyCategory.BinaryProduct.right_unitality, Truncated.cosk_reflective, CategoryTheory.nerve.functorOfNerveMap_nerveFunctor₂_map, Truncated.Path.mk₂_vertex, OneTruncation₂.nerveHomEquiv_apply, Truncated.HomotopyCategory.BinaryProduct.associativityIso_hom_app, Truncated.HomotopyCategory.homToNerveMk_app_zero, Truncated.Edge.map_whiskerRight, Truncated.comp_app, truncation_spine, Truncated.HomotopyCategory.homToNerveMk_comp, Truncated.HomotopyCategory.BinaryProduct.functor_map, CategoryTheory.nerve.functorOfNerveMap_obj, CategoryTheory.nerve.nerveFunctor₂_map_functorOfNerveMap, Truncated.HomotopyCategory.BinaryProduct.id_prod_mapHomotopyCategory_comp_inverse, Edge.toTruncated_id, Truncated.sk.faithful, StrictSegal.instIsStrictSegalObjTruncatedHAddNatOfNatTruncationOfIsStrictSegal, Truncated.HomotopyCategory.descOfTruncation_obj_mk, Truncated.HomotopyCategory.BinaryProduct.inverse_obj, Truncated.HomotopyCategory.homToNerveMk_comp_assoc, CategoryTheory.nerve.instFaithfulCatTruncatedOfNatNatNerveFunctor₂, Edge.toTruncated_edge, Truncated.hasLimits

TruncatedWittVector

Definitions

NameCategoryTheorems
coeff 📖CompOp
8 mathmath: WittVector.coeff_truncate, coeff_out, coeff_zero, mk_coeff, WittVector.coeff_truncateFun, coeff_mk, ext_iff, coeff_truncate
hasIntScalar 📖CompOp
1 mathmath: WittVector.truncateFun_zsmul
hasNatPow 📖CompOp
1 mathmath: WittVector.truncateFun_pow
hasNatScalar 📖CompOp
1 mathmath: WittVector.truncateFun_nsmul
instAdd 📖CompOp
5 mathmath: WittVector.truncateFun_add, commutes_symm', zmodEquivTrunc_apply, commutes', commutes_symm
instCommRing 📖CompOp
19 mathmath: WittVector.coeff_truncate, iInf_ker_truncate, truncate_wittVector_truncate, WittVector.truncate_surjective, commutes_symm', truncate_truncate, WittVector.mem_ker_truncate, truncate_comp_wittVector_truncate, charP_zmod, truncate_surjective, truncate_comp, WittVector.liftEquiv_symm_apply_coe, zmodEquivTrunc_apply, coeff_truncate, commutes, WittVector.truncate_mk', commutes', WittVector.zmodEquivTrunc_compat, commutes_symm
instFintype 📖CompOp
2 mathmath: card, card_zmod
instIntCast 📖CompOp
1 mathmath: WittVector.truncateFun_intCast
instMul 📖CompOp
5 mathmath: commutes_symm', zmodEquivTrunc_apply, WittVector.truncateFun_mul, commutes', commutes_symm
instNatCast 📖CompOp
1 mathmath: WittVector.truncateFun_natCast
instNeg 📖CompOp
1 mathmath: WittVector.truncateFun_neg
instOne 📖CompOp
1 mathmath: WittVector.truncateFun_one
instSub 📖CompOp
1 mathmath: WittVector.truncateFun_sub
instZero 📖CompOp
2 mathmath: WittVector.truncateFun_zero, coeff_zero
mk 📖CompOp
out 📖CompOp
4 mathmath: truncateFun_out, coeff_out, out_injective, WittVector.out_truncateFun
truncate 📖CompOp
11 mathmath: truncate_wittVector_truncate, commutes_symm', truncate_truncate, truncate_comp_wittVector_truncate, truncate_surjective, truncate_comp, coeff_truncate, commutes, commutes', WittVector.zmodEquivTrunc_compat, commutes_symm

Theorems

NameKindAssumesProvesValidatesDepends On
card 📖mathematicalFintype.card
TruncatedWittVector
instFintype
Monoid.toNatPow
Nat.instMonoid
Fintype.card_fun
Fintype.card_fin
coeff_mk 📖mathematicalcoeff
coeff_out 📖mathematicalWittVector.coeff
out
coeff
out.eq_1
coeff_truncate 📖mathematicalcoeff
DFunLike.coe
RingHom
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
RingHom.instFunLike
truncate
WittVector.truncate_surjective
truncate_wittVector_truncate
WittVector.coeff_truncate
coeff_zero 📖mathematicalcoeff
TruncatedWittVector
instZero
MulZeroClass.toZero
NonUnitalNonAssocSemiring.toMulZeroClass
NonUnitalNonAssocRing.toNonUnitalNonAssocSemiring
NonUnitalNonAssocCommRing.toNonUnitalNonAssocRing
NonUnitalCommRing.toNonUnitalNonAssocCommRing
CommRing.toNonUnitalCommRing
WittVector.coeff_truncateFun
WittVector.zero_coeff
ext 📖coeff
ext_iff 📖mathematicalcoeffext
iInf_ker_truncate 📖mathematicaliInf
Ideal
WittVector
CommSemiring.toSemiring
CommRing.toCommSemiring
WittVector.instCommRing
Submodule.instInfSet
NonUnitalNonAssocSemiring.toAddCommMonoid
NonAssocSemiring.toNonUnitalNonAssocSemiring
Semiring.toNonAssocSemiring
Semiring.toModule
RingHom.ker
TruncatedWittVector
RingHom
instCommRing
RingHom.instFunLike
RingHom.instRingHomClass
WittVector.truncate
Bot.bot
Submodule.instBot
RingHom.instRingHomClass
Submodule.eq_bot_iff
WittVector.ext
WittVector.zero_coeff
mk_coeff 📖mathematicalcoeffext
out_injective 📖mathematicalTruncatedWittVector
WittVector
out
ext
coeff_out
WittVector.ext_iff
truncateFun_out 📖mathematicalWittVector.truncateFun
out
coeff_out
mk_coeff
truncate_comp 📖mathematicalRingHom.comp
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
truncate
LE.le.trans
Nat.instPreorder
RingHom.ext
LE.le.trans
truncate_truncate
truncate_comp_wittVector_truncate 📖mathematicalRingHom.comp
WittVector
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
WittVector.instCommRing
instCommRing
truncate
WittVector.truncate
RingHom.liftOfRightInverse_comp
truncateFun_out
truncate_surjective 📖mathematicalTruncatedWittVector
DFunLike.coe
RingHom
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
RingHom.instFunLike
truncate
WittVector.truncate_surjective
truncate_wittVector_truncate
truncate_truncate 📖mathematicalDFunLike.coe
RingHom
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
RingHom.instFunLike
truncate
LE.le.trans
Nat.instPreorder
LE.le.trans
WittVector.truncate_surjective
truncate_wittVector_truncate
truncate_wittVector_truncate 📖mathematicalDFunLike.coe
RingHom
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
RingHom.instFunLike
truncate
WittVector
WittVector.instCommRing
WittVector.truncate
RingHom.liftOfRightInverse_comp_apply
truncateFun_out

WittVector

Definitions

NameCategoryTheorems
liftEquiv 📖CompOp
2 mathmath: liftEquiv_apply, liftEquiv_symm_apply_coe
liftFun 📖CompOp
1 mathmath: truncate_liftFun
truncate 📖CompOp
11 mathmath: coeff_truncate, truncate_comp_lift, TruncatedWittVector.iInf_ker_truncate, TruncatedWittVector.truncate_wittVector_truncate, truncate_surjective, mem_ker_truncate, TruncatedWittVector.truncate_comp_wittVector_truncate, truncate_lift, liftEquiv_symm_apply_coe, truncate_mk', truncate_liftFun
truncateFun 📖CompOp
19 mathmath: RecursionMain.succNthVal_spec', TruncatedWittVector.truncateFun_out, truncateFun_one, truncateFun_surjective, truncateFun_zero, truncateFun_add, truncateFun_pow, coeff_truncateFun, truncateFun_intCast, truncateFun_neg, truncateFun_natCast, nth_mul_coeff, truncateFun_nsmul, truncateFun_mul, out_truncateFun, nthRemainder_spec, truncateFun_sub, truncateFun_zsmul, nth_mul_coeff'

Theorems

NameKindAssumesProvesValidatesDepends On
coeff_truncate 📖mathematicalTruncatedWittVector.coeff
DFunLike.coe
RingHom
WittVector
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
TruncatedWittVector.instCommRing
RingHom.instFunLike
truncate
coeff
coeff_truncateFun
coeff_truncateFun 📖mathematicalTruncatedWittVector.coeff
truncateFun
coeff
truncateFun.eq_1
hom_ext 📖RingHom.comp
WittVector
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
TruncatedWittVector.instCommRing
truncate
Equiv.injective
liftEquiv_apply 📖mathematicalDFunLike.coe
Equiv
RingHom
WittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
EquivLike.toFunLike
Equiv.instEquivLike
liftEquiv
lift
liftEquiv_symm_apply_coe 📖mathematicalDFunLike.coe
Equiv
RingHom
WittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
EquivLike.toFunLike
Equiv.instEquivLike
Equiv.symm
liftEquiv
RingHom.comp
TruncatedWittVector
TruncatedWittVector.instCommRing
truncate
lift_unique 📖mathematicalRingHom.comp
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
TruncatedWittVector.instCommRing
TruncatedWittVector.truncate
WittVector
instCommRing
truncate
liftRingHom.ext
sub_eq_zero
Ideal.mem_bot
RingHom.instRingHomClass
TruncatedWittVector.iInf_ker_truncate
Ideal.mem_iInf
map_sub
RingHomClass.toAddMonoidHomClass
truncate_comp_lift
sub_self
mem_ker_truncate 📖mathematicalWittVector
Ideal
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
SetLike.instMembership
Submodule.setLike
NonUnitalNonAssocSemiring.toAddCommMonoid
NonAssocSemiring.toNonUnitalNonAssocSemiring
Semiring.toNonAssocSemiring
Semiring.toModule
RingHom.ker
TruncatedWittVector
RingHom
TruncatedWittVector.instCommRing
RingHom.instFunLike
RingHom.instRingHomClass
truncate
coeff
MulZeroClass.toZero
NonUnitalNonAssocSemiring.toMulZeroClass
NonUnitalNonAssocRing.toNonUnitalNonAssocSemiring
NonUnitalNonAssocCommRing.toNonUnitalNonAssocRing
NonUnitalCommRing.toNonUnitalNonAssocCommRing
CommRing.toNonUnitalCommRing
RingHom.instRingHomClass
truncateFun_one
truncateFun_mul
truncateFun_zero
truncateFun_add
TruncatedWittVector.coeff_zero
out_truncateFun 📖mathematicalTruncatedWittVector.out
truncateFun
init
ext
coeff_truncateFun
truncateFun_add 📖mathematicaltruncateFun
WittVector
instAdd
TruncatedWittVector
TruncatedWittVector.instAdd
TruncatedWittVector.out_injective
out_truncateFun
init_add
truncateFun_intCast 📖mathematicaltruncateFun
WittVector
instIntCast
TruncatedWittVector
TruncatedWittVector.instIntCast
truncateFun_mul 📖mathematicaltruncateFun
WittVector
instMul
TruncatedWittVector
TruncatedWittVector.instMul
TruncatedWittVector.out_injective
out_truncateFun
init_mul
truncateFun_natCast 📖mathematicaltruncateFun
WittVector
instNatCast
TruncatedWittVector
TruncatedWittVector.instNatCast
truncateFun_neg 📖mathematicaltruncateFun
WittVector
instNeg
TruncatedWittVector
TruncatedWittVector.instNeg
TruncatedWittVector.out_injective
out_truncateFun
init_neg
truncateFun_nsmul 📖mathematicaltruncateFun
WittVector
hasNatScalar
TruncatedWittVector
TruncatedWittVector.hasNatScalar
TruncatedWittVector.out_injective
out_truncateFun
init_nsmul
truncateFun_one 📖mathematicaltruncateFun
WittVector
instOne
TruncatedWittVector
TruncatedWittVector.instOne
truncateFun_pow 📖mathematicaltruncateFun
WittVector
hasNatPow
TruncatedWittVector
TruncatedWittVector.hasNatPow
TruncatedWittVector.out_injective
out_truncateFun
init_pow
truncateFun_sub 📖mathematicaltruncateFun
WittVector
instSub
TruncatedWittVector
TruncatedWittVector.instSub
TruncatedWittVector.out_injective
out_truncateFun
init_sub
truncateFun_surjective 📖mathematicalWittVector
TruncatedWittVector
truncateFun
TruncatedWittVector.truncateFun_out
truncateFun_zero 📖mathematicaltruncateFun
WittVector
instZero
TruncatedWittVector
TruncatedWittVector.instZero
truncateFun_zsmul 📖mathematicaltruncateFun
WittVector
hasIntScalar
TruncatedWittVector
TruncatedWittVector.hasIntScalar
TruncatedWittVector.out_injective
out_truncateFun
init_zsmul
truncate_comp_lift 📖mathematicalRingHom.comp
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
TruncatedWittVector.instCommRing
TruncatedWittVector.truncate
WittVector
instCommRing
truncate
lift
RingHom.ext
RingHom.comp_apply
truncate_lift
truncate_lift 📖mathematicalRingHom.comp
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
TruncatedWittVector.instCommRing
TruncatedWittVector.truncate
DFunLike.coe
RingHom
WittVector
instCommRing
RingHom.instFunLike
truncate
lift
truncate_liftFun
truncate_liftFun 📖mathematicalRingHom.comp
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
TruncatedWittVector.instCommRing
TruncatedWittVector.truncate
DFunLike.coe
RingHom
WittVector
instCommRing
RingHom.instFunLike
truncate
liftFun
TruncatedWittVector.ext
truncate_mk'
RingHom.comp_apply
TruncatedWittVector.coeff_truncate
truncate_mk' 📖mathematicalDFunLike.coe
RingHom
WittVector
TruncatedWittVector
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
TruncatedWittVector.instCommRing
RingHom.instFunLike
truncate
mk'
TruncatedWittVector.ext
coeff_truncate
truncate_surjective 📖mathematicalWittVector
TruncatedWittVector
DFunLike.coe
RingHom
Semiring.toNonAssocSemiring
CommSemiring.toSemiring
CommRing.toCommSemiring
instCommRing
TruncatedWittVector.instCommRing
RingHom.instFunLike
truncate
truncateFun_surjective

(root)

Definitions

NameCategoryTheorems
TruncatedWittVector 📖CompOp
35 mathmath: TruncatedWittVector.card, WittVector.coeff_truncate, TruncatedWittVector.iInf_ker_truncate, TruncatedWittVector.truncate_wittVector_truncate, WittVector.truncateFun_one, WittVector.truncate_surjective, WittVector.truncateFun_surjective, WittVector.truncateFun_zero, WittVector.truncateFun_add, WittVector.truncateFun_pow, TruncatedWittVector.commutes_symm', TruncatedWittVector.truncate_truncate, TruncatedWittVector.coeff_zero, WittVector.mem_ker_truncate, TruncatedWittVector.truncate_comp_wittVector_truncate, TruncatedWittVector.charP_zmod, TruncatedWittVector.out_injective, WittVector.truncateFun_intCast, TruncatedWittVector.truncate_surjective, TruncatedWittVector.truncate_comp, WittVector.truncateFun_neg, TruncatedWittVector.card_zmod, WittVector.truncateFun_natCast, WittVector.liftEquiv_symm_apply_coe, WittVector.truncateFun_nsmul, TruncatedWittVector.zmodEquivTrunc_apply, WittVector.truncateFun_mul, TruncatedWittVector.coeff_truncate, TruncatedWittVector.commutes, WittVector.truncate_mk', TruncatedWittVector.commutes', WittVector.truncateFun_sub, WittVector.truncateFun_zsmul, WittVector.zmodEquivTrunc_compat, TruncatedWittVector.commutes_symm
instInhabitedTruncatedWittVector 📖CompOp
witt_truncateFun_tac 📖CompOp

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