Left-handedness

Very interesting one about Left-handedness. A week ago, happened to see a documentary in NGC on the same. Few points are here for you.

Left-handedness is the preference for the left hand over the right for everyday activities such as writing. Most left-handed people exhibit some degree of ambidexterity. Left-handedness is relatively uncommon; seven to ten percent of the adult population is left-handed.

Causes of left-handedness
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• Hand orientation is developed in fetuses, most commonly determined by observing which hand is predominantly held close to the mouth
• Long-term impairment of the right hand: People with long-term impairment of the right hand are more likely to become left-handed, even after their right hand heals. Such long-term impairment is defined as eight months or more.
• Testosterone: Exposure to higher rates of testosterone before birth can lead to a left-handed child. This is the Geschwind theory, named after the neurologist who proposed it, Norman Geschwind. It suggests that variations in levels of testosterone during pregnancy shape the development of the fetal brain. Testosterone suppresses the growth of the left cerebral hemisphere and so more neurons migrate to the right hemisphere. The highly developed right hemisphere is now better suited to function as the center of language and handedness. The fetus is more likely to become left-handed, since the right hemisphere controls the left half of the body. The theory goes on to tie the exposure to higher levels of testosterone and the resultant right-hemisphere dominance to auto-immune disorders, learning disorders, dyslexia, and stuttering, as well as increased spatial ability.

How a Mathematician will write a Love Letter???

My Dear Love,

Yesterday, I was passing by your rectangular house in trigonometric lane.
There I saw you with your cute circular face, conical nose and spherical
eyes, standing in your triangular garden.

Before seeing you, my heart was a null set, but when a vector of magnitude
(likeness) from your eyes at a deviation of t radians made a tangent to my
heart, it differentiated.

My love for you is a quadratic equation with real roots, which only you can
solve by making good binary relation with me. The cosine of my love for you
extends to infinity. I promise that I should not resolve you into partial
functions but if I do so, you can integrate me by applying the limits from
zero to infinity.

You are as essential to me as an element to a set. The geometry of my life
revolves around your acute personality. My love, if you do not meet me at
parabola restaurant on date 10 at sunset, when the sun will be making an
angle of 160 degrees with our horizon, my heart would be like a solved
polynomial of degree 10.

With love from your higher order derivatives of maxima and minima, of an
unknown function.

Love