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Esimerkit

• In this section we will apply the concept of connectedness in dimension d to study tangencies of algebraic varieties.
• To be tangent to a circle or arc, a line must touch the circle or arc at only one point, and a line drawn from the center of the circle or arc must be perpendicular to the tangent line at the point of tangency. (See Figure 6.82.)
• If the original tangency is at A, then the new tangency cannot be at O or P, as either possibility would require two indifference curves to cross.[...]Instead, the new tangency is at a point like B.