Namespaces
Variants
Actions

Difference between revisions of "Hermite identity"

From Encyclopedia of Mathematics
Jump to: navigation, search
(LaTeX)
 
Line 12: Line 12:
  
 
====References====
 
====References====
<table><TR><TD valign="top">[a1]</TD> <TD valign="top"> I. Stewart,   "Galois theory" , Chapman &amp; Hall (1979)</TD></TR></table>
+
<table>
 +
<TR><TD valign="top">[a1]</TD> <TD valign="top"> I. Stewart, "Galois theory", Chapman &amp; Hall (1979) {{ZBL|0269.12104}}</TD></TR>
 +
</table>

Latest revision as of 08:23, 28 April 2023

An identity applied by Ch. Hermite (1873) to certain specially constructed polynomials in the proof that the number $e$ is transcendent. In a simplified form it is $$ e^x F(0) - F(x) = e^x \int_0^x e^{-t} f(t) dt $$ where $f(x)$ is a polynomial in $x$ and $$ F(x) = \sum_{k=0}^\infty f^{(k)}(x) \ . $$

Comments

For a proof of the transcendence of $e$ and use of Hermite's identity see, e.g., [a1], Thm. 6.4. There a simplified version of Hermite's original proof is given.

References

[a1] I. Stewart, "Galois theory", Chapman & Hall (1979) Zbl 0269.12104
How to Cite This Entry:
Hermite identity. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Hermite_identity&oldid=53875