(topology) | hairy ball - A result in topology stating that a continuous
vector field on a sphere is always zero somewhere. The name
comes from the fact that you can't flatten all the hair on a
hairy ball, like a tennis ball, there will always be a tuft
somewhere (where the tangential projection of the hair is
zero). An immediate corollary to this theorem is that for any
continuous map f of the sphere into itself there is a point
x such that f(x)=x or f(x) is the antipode of x. Another
corollary is that at any moment somewhere on the Earth there
is no wind. |

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hairline

hairline fracture

hairnet

hairpiece

Hairpin

hairpin bend

hairsbreadth

Hairsplitter

Hairsplitting

Hairspring

Hairstreak

hairstreak butterfly

hairstylist

Hairtail

hairweaving

Hairy

**-- hairy ball --**

hairy darling pea

hairy finger grass

hairy golden aster

Hairy Hands

hairy honeysuckle

hairy lip fern

hairy root

hairy spurge

hairy tare

hairy tongue

hairy vetch

hairy willowherb

hairy wood mint

hairy-legged vampire bat

Haiti

Haitian

hairline fracture

hairnet

hairpiece

Hairpin

hairpin bend

hairsbreadth

Hairsplitter

Hairsplitting

Hairspring

Hairstreak

hairstreak butterfly

hairstylist

Hairtail

hairweaving

Hairy

hairy darling pea

hairy finger grass

hairy golden aster

Hairy Hands

hairy honeysuckle

hairy lip fern

hairy root

hairy spurge

hairy tare

hairy tongue

hairy vetch

hairy willowherb

hairy wood mint

hairy-legged vampire bat

Haiti

Haitian