The general solutions for the harmonic oscillator differential equation fall into four general categories: 1) Undamped: [math]x(t) = Ae^{i\omega t}[/math] This is a free-running sinusoidal oscillation that doesn't change over time.
Key Facts. 1  Itâs normal to have mild cramps during your period. 2  Menstrual cramps often start 1-2 days after your period begins. 3  If your cramps donât get better with over-the-counter medicine, you should see your health care provider.
what should i do is it normal the time before your period and also during your period are times in which the body is experiencing rapid swings in hormone levels these changes can cause mood problems such as irritability fatigue and depression for many womenhe time before your period and also during your period are times in which the body is experiencing rapid swings in hormone levels these changes can cause mood problems such as irritability fatigue and depression for many women