<div class="sw-email-modal sw--display-block"> <div id="emailModalContentContainer"> <span class="noty_close sw--position-absolute sw--position-right sw--padding-top-3 sw--padding-right-3 icon-cancel sw--opacity-8"></span> <div class="sw-row"> <div class="sw-email-modal__copy sw--position-relative sw--display-block sw--padding-vert-4"> <p class="last sw--font-size-16">Sign up to get email alerts on discount promotions. There might be one very soon...</p> <form action="/register/email-signup" class="sw-email-modal__signup sw--position-relative" data-confirmation="emailConfirmationModal" data-sw-email-modal-form> <input type="text" class="sw-email-modal__signup-input sw--input-height__medium" placeholder="Email address" name="email" /> <input type="hidden" class="sw-email-modal__signup-input" name="location" value="/product/UJ46RQW2U/horned-sphere-fat" /> <input type="hidden" class="sw-email-modal__signup-input" name="confirmation" value="emailConfirmationModal" /> <input type="submit" class="btn-primary" value="Sign Up" /> <div id="emailModalFormError" class="text-error" style="display:none"></div> </form> </div> </div> </div>

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Horned sphere (fat) 3d printed

DIGITAL PREVIEW
Not a Photo

White Strong & Flexible
Horned sphere (fat) 3d printed
Horned sphere (fat) 3d printed

DIGITAL PREVIEW
Not a Photo

Horned sphere (fat)

Made By
OVERVIEW
  • 3D printed in White Strong & Flexible: White nylon plastic with a matte finish and slight grainy feel.
  • Be the first to try. Learn more
  • This product is intended for mature audiences.
$63.30
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Product Description

The Alexander horned sphere is a topological shape whose interior is equivalent to the inside of a ball, but the outside is not equivalent to the outside of a ball.
For example, you can contract a loop in the outside of a ball, but not in the outside of the horned sphere if the loop goes around the handle. However, with this approximation of the horned sphere, you can contract the loop because it branches only finitely many times. So here is a puzzle game that will test your patience and give you an intuitive understanding why it is impossible to contract the loop in the ideal case: Tie a thread around the big handle and try to free it by maneuvering it through the branches.

If this product is too expensive for you, try the less fat version, also available in my shop.
What's in the Box
INCM
Horned sphere (fat)
White Strong & Flexible
Width
14.3 cm
Height
3.7 cm
Depth
11.3 cm

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