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2 changes: 1 addition & 1 deletion AngouriMath/Core/FromString/Lexer.cs
Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,7 @@ internal static BraceType GetBraceType(char s)
}
}
internal static readonly Regex numberRegexp = new Regex(@"^-?(\d+(\.(\d+)?)?)?i?$");
internal static readonly Regex variableRegexp = new Regex(@"^[a-zA-Z]+$");
internal static readonly Regex variableRegexp = new Regex(@"^[a-zA-ZΑ-Ωα-ω]+$");
internal static bool IsNumber(string s)
{
return numberRegexp.IsMatch(s);
Expand Down