You will also have a test called a gastric pH level test to measure the amount of acid in your stomach. This helps to tell whether it is a gastrinoma causing the high gastrin levels or if there is another cause. Your doctor may do this test when you are having an endoscopy.
Euler's name is associated with a large number of topics. Euler is the only mathematician to have two numbers named after him: the important Euler's number in calculus, e, approximately equal to 2.71828, and the EulerâMascheroni constant Î³ sometimes referred to as just Euler's constant, approximately equal to 0.57721.
Euler method - Example. 1  Given the initial value problem. 2  we would like to use the Euler method to approximate y ( 4 ) {\displaystyle y (4)} . [5] 3  The Euler method is. 4  so first we must compute f ( t 0 , y 0 ) {\displaystyle f (t_ {0},y_ {0})} .