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*From*: Bernard Cleyet <bernardcleyet@redshift.com>*Date*: Thu, 3 Jul 2008 13:05:03 -0700

Must be; I use ln and I'm very common.

bc

p.s. Kaleidograph uses ln, does Excel also?

On 2008, Jul 03, , at 09:32, Alby Reid wrote:

I've always used ln ("ell-en") for log_e - is this uncommon?inserted

Alby

--

Alby <alby@bleary-id.co.uk>

-----Original Message-----

From: phys-l-bounces@carnot.physics.buffalo.edu

[mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of John Denker

Sent: 03 July 2008 15:43

To: Forum for Physics Educators

Subject: [Phys-l] base of log

On 07/03/2008 06:52 AM, Dan Crowe wrote:

I have many books and papers in which "log" refers to the base e. I

also have a comparable number of books and papers in which "log"

refers to the base 10.

In the field of information theory, "log" very commonly refers to base 2.

====================

The only consistent approach to the subject it to say that "log" by

itself does not denote or even connote any particular base. It could

be 2, e, 10, or something else entirely. Sometimes the base is specified

by context, and sometimes it is left unspecified because it doesn't matter.

The huuuge base

exp(1/k)

is often encountered in thermodynamics. For the next level of detail, see

http://www.av8n.com/physics/thermo-laws.htm#sec-s-units

The integral of zee-squared dee zee,

From 1 to the cube root of 3,

Times the cosine,

Of 3 pi over 9,

Is the log of the cube root of e.

_______________________________________________

**Follow-Ups**:**Re: [Phys-l] base of log***From:*"Polvani, Donald G." <donald.polvani@ngc.com>

**References**:**Re: [Phys-l] Limrick***From:*"Dan Crowe" <Dan.Crowe@Loudoun.K12.VA.US>

**[Phys-l] base of log***From:*John Denker <jsd@av8n.com>

**Re: [Phys-l] base of log***From:*"Alby Reid" <alby@bleary-id.co.uk>

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