include Ppx_sexp_conv_lib.Sexpable.S with type t := t
val t_of_sexp : Sexplib0__.Sexp.t -> tval sexp_of_t : t -> Sexplib0__.Sexp.tval eval : [ `Return_values_will_be_mutated of int -> Field.t ] -> t -> Field.tval linear_combination : (Field.t * t) list -> tval var_indices : t -> int list