This file is indexed.

/usr/share/yacas/predicates.rep/code.ys.def is in yacas 1.3.3-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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IsScalar
IsMatrix
IsVector
IsSquareMatrix
IsRational
IsRationalOrNumber
IsPositiveNumber
IsNegativeNumber
IsNonNegativeNumber
IsZero
IsNotZero
IsNonZeroInteger
IsPositiveInteger
IsNegativeInteger
IsNonNegativeInteger
IsEven
IsOdd
IsEvenFunction
IsOddFunction
IsInfinity
IsConstant
IsBoolean
IsBoolType
IsPositiveReal
IsNegativeReal
IsHermitian
IsSymmetric
IsSkewSymmetric
IsIdempotent
IsOrthogonal
IsUnitary
IsVariable
IsDiagonal
IsUpperTriangular
IsLowerTriangular
IsNumericList
HasExpr
HasFunc
HasExprSome
HasFuncSome
ListHasFunc
HasExprArith
HasFuncArith
FloatIsInt
}