Misprints and Rarities
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#129:Topologic
If one object can be mapped onto another via a continuous bijection that has a continuous inverse, the objects are said to be topologically equivalent. For the non-mathematical among you, this is the same as saying you can turn a stretchable model of the first object into the second by moulding it, but without tearing or joining parts together.
Group the marked objects in this picture into sets that are topologically equivalent.
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"Is that Saunion?"
Daniel scratched his leg while trying to plot a safe route down. The rock fall had made the slope desperately unsafe and it would be easy to accidentally dislodge more debris.
"Saunion?" repeated the voice in his ear hopefully.
"I can see you, keep moving. I'm heading over now," he replied.
"Great... I can't believe..."
The voice broke off into sobbing as Daniel slowly made his way down towards the waving hand below. Loose pebbles crunched and scattered underneath his boots, setting off chain reactions. He never considered himself to be much of a climber, and this was the kind of situation he hated most, half-crouching, half-slipping down a slope. As he traversed across, he lost his footing and slid down sideways until he managed to flip himself around and spread his arms out. Shaking, he slowly stood upright, and looked for the ahnd again. It took him a while to find it, since it had stopped moving.
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