/usr/lib/ocaml/gsl/gsl_integration.mli is in libocamlgsl-ocaml-dev 1.19.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 | (* gsl-ocaml - OCaml interface to GSL                       *)
(* Copyright (©) 2002-2012 - Olivier Andrieu                *)
(* Distributed under the terms of the GPL version 3         *)
(** Numerical Integration *)
open Gsl_fun
external qng :
  gsl_fun -> a:float -> b:float -> 
    epsabs:float -> epsrel:float -> float * float * int
  = "ml_gsl_integration_qng"
type workspace
val make_ws : int -> workspace
external size : workspace -> int
    = "ml_gsl_integration_ws_size"
type key = 
  | GAUSS15
  | GAUSS21 
  | GAUSS31
  | GAUSS41
  | GAUSS51
  | GAUSS61
external qag :
    gsl_fun -> a:float -> b:float -> epsabs:float -> epsrel:float ->
      ?limit:int -> key -> workspace -> result
    = "ml_gsl_integration_qag_bc" "ml_gsl_integration_qag"
external qags :
    gsl_fun -> a:float -> b:float -> epsabs:float -> epsrel:float ->
      ?limit:int -> workspace -> result
    = "ml_gsl_integration_qags_bc" "ml_gsl_integration_qags"
external qagp :
    gsl_fun -> pts:float array -> epsabs:float -> epsrel:float ->
      ?limit:int -> workspace -> result
    = "ml_gsl_integration_qagp_bc" "ml_gsl_integration_qagp"
external qagi :
    gsl_fun -> epsabs:float -> epsrel:float ->
      ?limit:int -> workspace -> result
    = "ml_gsl_integration_qagi"
external qagiu :
    gsl_fun -> a:float -> epsabs:float -> epsrel:float ->
      ?limit:int -> workspace -> result
    = "ml_gsl_integration_qagiu_bc" "ml_gsl_integration_qagiu"
external qagil :
    gsl_fun -> b:float -> epsabs:float -> epsrel:float ->
      ?limit:int -> workspace -> result
    = "ml_gsl_integration_qagil_bc" "ml_gsl_integration_qagil"
val qag_sing : gsl_fun -> a:float -> b:float -> ?pts:float array ->
  ?limit:int ->  epsabs:float -> epsrel:float -> unit -> result
external qawc :
    gsl_fun -> a:float -> b:float -> c:float ->
      epsabs:float -> epsrel:float ->
	?limit:int -> workspace -> result
    = "ml_gsl_integration_qawc_bc" "ml_gsl_integration_qawc"
type qaws_table
external alloc_qaws : alpha:float -> beta:float -> 
  mu:int -> nu:int -> qaws_table
    = "ml_gsl_integration_qaws_table_alloc"
external set_qaws : qaws_table -> alpha:float -> beta:float -> 
  mu:int -> nu:int -> unit
    = "ml_gsl_integration_qaws_table_set"
external free_qaws : qaws_table -> unit
    = "ml_gsl_integration_qaws_table_free"
external qaws :
    gsl_fun -> a:float -> b:float -> qaws_table ->
      epsabs:float -> epsrel:float ->
	?limit:int -> workspace -> result
    = "ml_gsl_integration_qaws_bc" "ml_gsl_integration_qaws"
type qawo_table
type qawo_sine =
  | QAWO_COSINE
  | QAWO_SINE
external alloc_qawo : omega:float -> l:float -> 
  qawo_sine -> n:int -> qawo_table
    = "ml_gsl_integration_qawo_table_alloc"
external set_qawo : qawo_table -> omega:float -> l:float -> 
  qawo_sine -> unit
    = "ml_gsl_integration_qawo_table_set"
external free_qawo : qawo_table -> unit
    = "ml_gsl_integration_qawo_table_free"
external qawo :
    gsl_fun -> a:float -> epsabs:float -> epsrel:float ->
	?limit:int -> workspace -> qawo_table -> result
    = "ml_gsl_integration_qawo_bc" "ml_gsl_integration_qawo"
	    
external qawf :
    gsl_fun -> a:float -> epsabs:float ->
      ?limit:int -> workspace -> workspace -> qawo_table -> result
    = "ml_gsl_integration_qawf_bc" "ml_gsl_integration_qawf"
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