3-sphere two 3-balls. This construction is analogous to a construction of a 2-sphere, performed by gluing the boundaries of a pair of disks. A disk is a 2-ball, and the boundary of a disk is a circle (a 1-sphere). Let a pair of disks be of the same diameter. Superpose them and glue corresponding points on their boundaries. Again one may think of the third dimension as temperature. Likewise, we may inflate the 2-sphere, moving the pair of disks to become the northern and southern hemispheres. After removing a single point from the 2-sphere, what remains is homeomorphic to the Euclidean
Public sphere and "what is not" discussed. Benhabib argues for feminists to counter the popular public discourse in their own counter public. The public sphere was long regarded as men's domain whereas women were supposed to inhabit the private domestic sphere. A distinct ideology that prescribed separate spheres for women and men emerged during the industrial revolution. The concept of heteronormativity is used to describe the way in which those who fall outside of the basic male/female dichotomy of gender or whose sexual orientations are other than heterosexual cannot meaningfully claim their identities, causing a disconnect between their public selves and their