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Sometimes I really want to use the word "shall" in my writing. But I get unnerved because I got a feeling it's pretentious or outdated. Any opinions?

Is it a nice variation on "will"?

Other alternatives?

Patrick
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    What sort of context do you use it in? To me it doesn't sound pretentious or old-fashioned. – Frank Apr 01 '14 at 21:34
  • Example: "We shall now develop expression 5..." – Patrick Apr 01 '14 at 21:58
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    Ok, I think it's more natural to say 'will', and in any similar context, even though I'm English. – Frank Apr 01 '14 at 22:20
  • Several years ago I took english classes at UCLA extension. The teacher said that "shall" was somehow pretentious or/and stuck up. – Felix Marin Apr 01 '14 at 22:58
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    Thou shan't use shall in mathematical writing! – Lucian Apr 02 '14 at 02:16
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    We shall denote such and such by "...". I don't find it pretentious. Anyways I see it written all the time. – ClassicStyle Nov 01 '14 at 00:24
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    "We shall carry out a proof of this claim in section 7 after developing the necessary theory." Sounds good to me. – Pedro Nov 01 '14 at 00:25
  • One of my books was full of "whence" and "hence" so in a homework assignment I used the word "whence." The comment came back from the professor: English is the official language! I never used "whence" again. – user4894 Nov 01 '14 at 02:09

4 Answers4

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It is nothing to do with being stuck up or pretentious. The rule in English is that 'shall' ought to be used with 'I' and 'we', and 'will' ought to be used with any other pronoun (you, they, he, she, it). If you wanted emphasis, this was reversed: 'I will do it', 'You shall go to the ball'. Although nowadays this is increasingly ignored and 'will' seems to be used with every pronoun.

Interestingly, the occasion when you have to use 'shall' is when in the form of a question, i.e.: 'Shall I wash the dishes?' and not 'Will I wash the dishes?' which has a different meaning.

user50229
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One thing to keep in mind is that good mathematical writing is (in part) just good writing. Overusing one word (without a good reason) makes your writing less interesting (Knuth specifically talks about this http://jmlr.csail.mit.edu/reviewing-papers/knuth_mathematical_writing.pdf). So shall (or some other synonym) could be useful in writing as a nice change of pace to break up a bunch of "will"s and to keep your word choice more interesting.

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This is an English issue, not limited to math writing. Briefly, "shall" is rather more common in the UK then the USA. In practice they are more or less interchangeable in the context you describe.

To my (North American) ear, "shall" sounds a little old-fashioned, but not pretentious or outdated.

Greg Martin
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While user50229 is right about the complex rule that emerged in the 18th and 19th centuries an older sense of < shall > versus < will > might be simpler to revive. The reason that the 19th-century reversal used to distinguish the two words was courtesy. Because < shall > implies a degree of compulsion or duty, the courtesy rule was to impose an obligation on yourself, but allow volition (< will >) for others.

An easy way to see the simpler, older rule is to look at the two conditional forms < should > and < would >, which are still used fairly regularly in their proper sense, with < should > implying some kind of obligation and < would > implying some kind of volition.

There's little harm in using both interchangeably in maths writing to give variety, as Gage says, but the essence of the real difference is that < shall > and < should > are somewhat stronger in feel.

Travelling Salesman
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    A bit mystified how this last comment of mine got marked as < -1 >, even if the whole topic has been decided as unsuitable!

    The underlying logic that < shall > and < should > imply obligation while < will > and < would > imply volition is clear and correct. Did I annoy someone?

     – Travelling Salesman Dec 19 '15 at 16:11