Content deleted Content added
m →A simple motivating example: fixed grammar |
m →A simple motivating example: fixed typo "parabola" should have been "hyperbola" |
||
Line 16:
the [[hyperbola]] {{mvar|H}} of equation <math>xy-1=0</math> is <math>L_x\setminus \{0\},</math> which is not closed, although {{mvar|H}} is closed, being an [[algebraic variety]].
If one extends <math>L_y</math> to a projective line <math>P_y,</math> the equation of the [[projective completion]] of the
:<math>xy_1-y_0=0,</math>
and contains
| |||