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In fixpoint typing rule section, a type of constructor is described
twice:
- ∀ p_1:P_1,~… ∀ p_r :P_r,~∀ x_1:T_1,~… ∀ x_r:T_r,~(I_j~p_1 … p_r~t_1 … t_s)
- ∀ p_1:P_1,~…,∀ p_r :P_r,~∀ y_1:B_1,~… ∀ y_k:B_k,~(I~a_1 … a_k)
Both seems invalid.
The former require that the number of parameters and
the number of (non-parameter) constructor argumets is same.
The latter require that the number of (non-parameter) constructor
argumets and the number of inductive type arguments (including paramters) is
same.
Also, "k" is already used for the number of inductive types in
a inductive definition.
So, I changed the number of (non-parameter) constructor
argumets to "m". I choose "m" because "m" is used for the purpose
in the description for iota-reduction of destructors.
Also, I changed the inductive type parameters and arguments of latter
consistent with the former.
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In the description of destructors,
"Type of branches" section and "Typing rule" section shares
the definition of "r" (and "s" from previous commit).
However actual parameters are p_1...p_r in the former section and
q_1...q_r in the latter section.
I guess it's because the latter section uses
p_1...p_l in other purpose: index of constructor for a inductive type.
So, I change the parameter p_1...p_r to q_1...q_r in the former section
to consistent with the latter section.
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In the description of destuctors,
"Type of branches" section uses "p" as the number of arguments.
It is confusing because "p" is used as the number of parameters.
After the section, "Typing rule." section uses "s" without definition as
I q1...qr t1...ts.
It seems that it is the number of arguments.
So, I changed "p" to "s".
"s" is also confusing with sorts, though.
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In Cic admissible rules section, c and c' are exchanged at
https://github.com/coq/coq/commit/8654b03544f0efe4b418a0afdc871ff84784ff83 .
But the exchange is not complete.
This commit complete it.
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"'" in the extended (k_i added) form of Fix syntax should be removed.
In the following sentence, A_i' is referenced as A_i.
```
Each :math:`A_i` should be a type (reducible to a term) starting
with at least :math:`k_i` products
:math:`∀ y_1 :B_1 ,~… ∀ y_{k_i} :B_{k_i} ,~A_i'`
```
Also, A_i' is used in ∀ y_1 :B_1 ,~… ∀ y_{k_i} :B_{k_i} ,~A_i' and
A_i' must not equal to ∀ y_1 :B_1 ,~… ∀ y_{k_i} :B_{k_i} ,~A_i'.
The old reference manual, coq-8.7.2-reference-manual.pdf,
doesn't have "'".
They are added by
https://github.com/coq/coq/commit/47dca6c5da585212f69b6b83b25896ff990781e3
which ports Cic document from TeX to sphinx.
So, the change seems just an accident.
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Reviewed-by: cpitclaudel
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Reviewed-by: Zimmi48
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This work makes it possible to take advantage of a compact
representation for integers in the entire system, as opposed to only
in some reduction machines. It is useful for heavily computational
applications, where even constructing terms is not possible without such
a representation.
Concretely, it replaces part of the retroknowledge machinery with
a primitive construction for integers in terms, and introduces a kind of
FFI which maps constants to operators (on integers). Properties of these
operators are expressed as explicit axioms, whereas they were hidden in
the retroknowledge-based approach.
This has been presented at the Coq workshop and some Coq Working Groups,
and has been used by various groups for STM trace checking,
computational analysis, etc.
Contributions by Guillaume Bertholon and Pierre Roux <Pierre.Roux@onera.fr>
Co-authored-by: Benjamin Grégoire <Benjamin.Gregoire@inria.fr>
Co-authored-by: Vincent Laporte <Vincent.Laporte@fondation-inria.fr>
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Ack-by: JasonGross
Reviewed-by: fajb
Reviewed-by: jfehrle
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Ack-by: SkySkimmer
Reviewed-by: Zimmi48
Ack-by: ejgallego
Ack-by: gares
Reviewed-by: maximedenes
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Remove the 2nd premise "(E[Γ_P ] ⊢ A_j : s_j)_(j=1...k)".
Also, "Γ" in "c_i ∉ Γ ∪ E" is changed to "Γ_I".
"E[Γ_P ] ⊢ A_j : s_j" contradicts with a side condition
"A_j is an arity of sort s_j".
The latter means that A_j is ∀ x1:T1, ... ∀ xm:Tm, s_j.
So, "(∀ x1:T1, ..., s_j) : s_j)" is required.
Using Prod-{Prop,Set,Type}, it needs "s_j : s_j" which cannot be proved.
This problem is introduced at 2018-07-22:
https://github.com/coq/coq/commit/f25c1d252ad61b4dc4321e3a11f33b1e6d4e3dff
Before that, the premise describes "A_j : s'_j".
And "s'_j" is not explained anywhere.
I think "A_j : s'_j" describes that A_j is a type (a value of a sort).
Thus, "A_j is an arity of sort s_j" imply "A_j : s'_j".
So, I removed the 2nd premise.
Also, a side condition describes "c_i ∉ Γ ∪ E" but "Γ" is not explained.
I think that Γ should be Γ_I.
Γ should include Γ_I because a constructor, c_i, and inductive types are
both defined in global environment and it cannot accept duplicate name.
Actually, such definition fails:
```
Fail Inductive X := X : X.
(* The following names are used both as type names and constructor names: X.*)
```
Γ doesn't include Γ_P because parameters are not defined in global
environment.
Actually, a parameter can be same name as a constructor name:
```
Inductive I (X : nat) := X : I X.
Check X. (* X : forall X : nat, I X *)
```
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Cic description doesn't describe the lowest universe level clearly.
- "Type(i) for any integer i" seems Type(-1) is possible
- "S = {Prop,Set,Type(i)| i ∈ ℕ }" depends on the definition of "ℕ"
which is not described.
It is well known that there are two definitions that ℕ includes 0 or not.
In Coq, it is natural that ℕ includes 0 because the inductive type
nat includes 0.
- "Prop:Type(1), Set:Type(1)" suggests the lowest level is 1.
- AX-Prop and AX-Set describes Prop:Type(1) and Set:Type(1).
So, Prop and Set are not belongs to Type(0).
Also, CPDT describes that "The type of Set is Type(0)".
http://adam.chlipala.net/cpdt/html/Universes.html
I think the lowest universe level is 1 because AX-Prop and AX-Set.
I'm not certain to fix this problem but
my idea to fix this problem is changing
"Type(i) for any integer i" to
"Type(i) for any integer i ≥ 1".
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The former is more succinct and intuitive.
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c can be non-function since c:U.
So, c c' is not typeable.
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This commit basically ajusts spaces as
- ∀x:T,t to ∀x:T,~t
- λx:T.t to λx:T.~t
- E;c:T to E;~c:T
x and T are more related than T and t.
So, T and t should not positioned closely than x and T.
Unfortunately, they are formatted that T and t are positioned closely
without "~".
(Similary, c and T are more related than E and c.)
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The former is more succinct and consistent with most of
other parts in cic.rst.
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Add :math:`...` for mathematical expressions.
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"∀Γ_P ,∀Γ_{\mathit{Arr}(t)}, \Sort" is changed to
"∀Γ_P ,∀Γ_{\mathit{Arr}(t)}, S" because
\Sort is not a term.
"S" is choosen to be consistent with the description of
Inductive Definitions.
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Exchange a closing parenthesis and a :math: closing backquote.
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In the note about η-reduction,
two lambda-abstraction used "," instead of ".".
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After #9435 (Use \mathcal instead of \cal), \Sort doesn't have
font changing effect.
So, {\Sort} is same as \Sort now and the former is changed to latter in
cic.rst.
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This corresponds to "Module TreeExample." removed at
2018-04-24 bcf5352cc7a26a672e719f7dad4021c69d723833.
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Reviewed-by: JasonGross
Ack-by: SkySkimmer
Reviewed-by: Zimmi48
Reviewed-by: ejgallego
Ack-by: ppedrot
Ack-by: vbgl
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This PR deprecates the use of `coqtop` as a compiler.
There is no point on having two binaries with the same purpose; after
the experiment in #8690, IMHO we have a lot to gain in terms of code
organization by splitting the compiler and the interactive binary.
We adapt the documentation and adapt the test-suite.
Note that we don't make `coqc` a true binary yet, but here we take
care only of the user-facing part.
The conversion of the binary will take place in #8690 and will bring
code simplification, including a unified handling of arguments.
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Apparently it's deprecated / doesn't always work, see
https://tex.stackexchange.com/questions/84041/why-does-calm-n-give-m
See #9429 (we also need to fix the distributed file on the server).
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Reviewed-by: Zimmi48
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Reviewed-by: CohenCyril
Ack-by: Zimmi48
Ack-by: gares
Reviewed-by: maximedenes
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Reviewed-by: Zimmi48
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Z.to_euclidean_division_equations
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This reverts commit b49f4e966443a76ac70d37c4cde68f94de164c01.
It turns out the 4x was due to .nia.cache (because I didn't clean
sufficiently in testing), not due to `subst`.
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