\(y=\frac{1}{x}\) This means that the line y=0 is a horizontal asymptote. Horizontal asymptotes occur most often when the function is a fraction where the top remains positive, but the bottom goes to infinity. Going back to the previous example, \(y=\frac{1}{x}\) is a fraction.
Causes of Wounds. Wound causes can be internal or external in origin. Wounds of internal origin are mainly due to impaired circulation, neuropathy or medical illness. Wounds of external origin are due to an outside force or trauma that causes open or closed wounds.
Stab wound. For other uses, see Stab. A stab wound is a specific form of penetrating trauma to the skin that results from a knife or a similar pointed object that is deeper than it is wide. While typically stab wounds are thought only to be caused only by knives, they can also occur from ice picks, pens, broken bottles, and even coat hangers.