Emetophobia in public or having to witness someone else vomit, as the start of the emetophobia. They may also be afraid of hearing that someone is feeling like vomiting or that someone has vomited, usually in conjunction with the fears of seeing someone vomit or seeing vomit. There is a strong agreement in the scientific community that there is no specific cause of emetophobia. Some emetophobics report a traumatic experience with vomiting, always in childhood. Some suggest that sufferers are victims of childhood abuse – sexual or physical. While this is occasionally true, it seems to be no more prevalent than
Dirichlet eta function the formula_19 function is then analytic for formula_15, a region which includes the line formula_8. Now we can define correctly, where the denominators are not zero, or Since formula_24 is irrational, the denominators in the two definitions are not zero at the same time except for formula_25, and the formula_26 function is thus well defined and analytic for formula_15 except at formula_25. We finally get indirectly that formula_29 when formula_13: An elementary direct and formula_32-independent proof of the vanishing of the eta function at formula_13 was published by J. Sondow in 2003. It expresses the value of the eta function