Reaching temp of -273.15ºC proven mathematically impossible

London-based researchers have proved that achieving 'absolute zero' or -273.15°C temperature for any system is mathematically impossible. 'Absolute zero' (0 Kelvin) is a state at which energy, entropy, and enthalpy of a cooled ideal gas reach its minimum value, taken as 0. Researchers proved no real system will ever reach absolute zero in a finite number of steps and time.