Complex sentence: All the possible numbers\\ varepsilon--can be arranged into an "n"-dimensional square array containing numbers, although there are fewer independent values because of the key, definitive property of the symbol: "total antisymmetry" in "all" indices.
Split into simpler sentences: All the possible values of the symbol can be arranged into an "n"-dimensional square array. The key, definitive property of the symbol is "total antisymmetry" in "all" indices.