This does not change the object's essential properties: the transformed shape is equivalent to the starting shape.

ECONOMIST: Proof of the truth of the Poincar�� conjecture

It is more probable that a simple artificial genome could be created that has the essential properties of a living organism.

FORBES: 'Artificial Cells' May Provide Souce Of Algal Fuel

He added that the opportunity to invest in Fenway properties like Liverpool was essential for Mr. James to mitigate that risk.

WSJ: Basketball Star LeBron James in Deal With Fenway Sports

The new government guidelines would require rented properties to be "structurally sound with sufficient bathrooms, toilets washing and cooking facilities and other essential amenities, including sound and thermal insulation".

BBC: Isle of Man clamp down on multiple occupancy homes