From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=0.5 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE,RDNS_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 Received: (qmail 30441 invoked from network); 20 Mar 2020 15:41:35 -0000 Received-SPF: pass (minnie.tuhs.org: domain of minnie.tuhs.org designates 45.79.103.53 as permitted sender) receiver=inbox.vuxu.org; client-ip=45.79.103.53 envelope-from= Received: from unknown (HELO minnie.tuhs.org) (45.79.103.53) by inbox.vuxu.org with ESMTP; 20 Mar 2020 15:41:35 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 79C1C9CD83; Sat, 21 Mar 2020 01:41:33 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 4AA6D9D543; Sat, 21 Mar 2020 01:41:09 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (1024-bit key; secure) header.d=tnetconsulting.net header.i=@tnetconsulting.net header.b="LMswWRRV"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 07CA79CD7C; Sat, 21 Mar 2020 01:40:55 +1000 (AEST) Received: from tncsrv06.tnetconsulting.net (tncsrv06.tnetconsulting.net [45.33.28.24]) by minnie.tuhs.org (Postfix) with ESMTPS id 69B8C9CD73; Sat, 21 Mar 2020 01:40:54 +1000 (AEST) Received: from Contact-TNet-Consulting-Abuse-for-assistance by tncsrv06.tnetconsulting.net (8.15.2/8.15.2/Debian-3) with ESMTPSA id 02KFepLF027325 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Fri, 20 Mar 2020 10:40:53 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=tnetconsulting.net; s=2019; t=1584718853; bh=u+KtQ5SC+4ALXhxD5Dm/MEDKCOzKVT7LfIrwrw2YEsc=; h=Subject:To:References:Cc:From:Message-ID:Date:User-Agent: MIME-Version:In-Reply-To:Content-Type:Cc:Content-Disposition: Content-Language:Content-Transfer-Encoding:Content-Type:Date:From: In-Reply-To:Message-ID:MIME-Version:References:Reply-To: Resent-Date:Resent-From:Resent-To:Resent-Cc:Sender:Subject:To: User-Agent; b=LMswWRRV/RfuL1eeB2aB3aOpIo/0NtgdH9zGUnbOVaqDzI7qp98r0GC1XQvKXa9jj gd82yY5AGlSRrk7xpTzRb07gQ1NbhbuTZBeOZd9l+h1H9Jc3tE/AdyK/JWUNwtn/Bu FvmmRfMhGz4+b6PU2lksrPuI/28i16BSJbqZgv3s= To: tuhs@minnie.tuhs.org References: <202003132331.02DNVaxN061501@tahoe.cs.Dartmouth.EDU> <7ec47fd97b1a3d383ffed428f21f5287@firemail.cc> <6D9CA6C2-BDF2-4BCA-9503-0F8415C594C9@guertin.net> Message-ID: <211b9d54-573c-05d3-2c60-e15a9fc0b86b@tnetconsulting.net> Date: Fri, 20 Mar 2020 09:40:50 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <6D9CA6C2-BDF2-4BCA-9503-0F8415C594C9@guertin.net> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms080302060405090405030109" Subject: Re: [TUHS] The most surprising Unix programs X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Grant Taylor via TUHS Reply-To: Grant Taylor Cc: coff@minnie.tuhs.org Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" This is a cryptographically signed message in MIME format. --------------ms080302060405090405030109 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable Aside: I'm sending this reply to TUHS where the message that I'm=20 replying to came from. But i suspect that it should migrate to COFF,=20 which I'm CCing. On 3/20/20 5:48 AM, paul@guertin.net wrote: > I teach math in college, and I use an RPN calculator as well (it's=20 > just easier). Would you please elaborate on "it's just easier"? I'm asking from a point of genuine curiosity. I've heard many say that=20 RPN is easier, or that it takes fewer keys, or otherwise superior to=20 infix notation. But many of the conversations end up somewhat devolving = into religious like comments about preferences, despite starting with=20 honest open-minded intentions. (I hope this one doesn't similarly devolv= e.) I've heard that there are fewer keys to press for RPN, but the example=20 equations presented have been effectively he same. I've heard that RPN is mentally easier. But I apparently don't know=20 enough RPN to be able to think in RPN natively to evaluate myself. I dabble with RPN, including keeping my main calculator app on my smart=20 phone in RPN mode. So I am genuinely interested in understanding why you say that RPN is=20 just easier. > Sometimes, during an exam, a student who forgot to bring their=20 > calculator will ask if they can borrow mine. I always say "sure, but=20 > you'll regret it" and hand them the calculator. After wasting one or=20 > two minutes, they give it back. ~chuckle~ > (Note that I always make sure no calculator is needed for my exams,=20 > but it's department policy to authorise non programmable calculators,=20 > and it seems to reassure students to have the calculator on the desk,=20 > so I don't mind.) > ACK --=20 Grant. . . . unix || die --------------ms080302060405090405030109 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC CzkwggUhMIIECaADAgECAhA53zcXtFD9dENby64EqrKqMA0GCSqGSIb3DQEBCwUAMIGWMQsw CQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxm b3JkMRgwFgYDVQQKEw9TZWN0aWdvIExpbWl0ZWQxPjA8BgNVBAMTNVNlY3RpZ28gUlNBIENs aWVudCBBdXRoZW50aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMB4XDTE5MTExOTAwMDAw 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