Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Equivalence, copper wire, stone, Oxford, U.K, 2013 Slide 1 Slide 1 (current slide) Slide 2 Slide 2 (current slide) Slide 3 Slide 3 (current slide) Slide 4 Slide 4 (current slide) Slide 5 Slide 5 (current slide) Slide 6 Slide 6 (current slide) Slide 7 Slide 7 (current slide) Slide 8 Slide 8 (current slide)