we leave this question as open problem vs we leave this question as an open problem

Both phrases are correct, but they are used in different contexts. 'We leave this question as open problem' is incorrect because 'open' should be preceded by the article 'an'. 'We leave this question as an open problem' is the correct form, where 'an' is used before 'open' to indicate that 'problem' is a countable noun.

Last updated: March 24, 2024 • 1238 views

This phrase is incorrect. 'Open' should be preceded by the article 'an'.

"we leave this question as open problem"

Incorrect usage. 'Open' should be preceded by the article 'an' to indicate that 'problem' is a countable noun.

Show examples from the web [+]

Once we leave this tragic little town.
She won't be with us when we leave this school.
We leave this place, we're asking to get caught.
However, before we leave this place tomorrow morning, and better'.
We leave this room altogether for 1 0 minutes.
We must be pure of heart when we leave this place.
If we leave this here 'til morning...
Not if we leave this planet first.
Alright. When we leave this boat, this conversation never happened.
We leave this lunch alone, it will take over Europe.
At this stage, the Commission leaves this question open.
We are assessing this question as part of our ongoing public consultation on retail financial services.
If we must leave this house, we leave it together.
When we leave this room, you will no longer be dependents but full-fledged members of our society.
Before we leave this life, we... see what we love.
No matter what happens to your father, when we leave this room you will find the world outside has changed.
If we leave this pander alone now, he will uprise again in the first opportunity.
All right, can we leave this cursed place now?
Sir, when we leave this building tonight, we'll do it in very different ways.
And I have big plans for you when we leave this town.

This phrase is correct and commonly used in English.

"we leave this question as an open problem"

Correct usage. 'An' is used before 'open' to indicate that 'problem' is a countable noun.

Show examples from the web [+]

I'll leave Thermopylae as an open door for them.
There's no such thing as an open-and- shut case where custody is involved.
A fund may be established either as an open-end or closed-end.
As an open standard, it would offer the European banking industry independence from the owners of proprietary standards and/ or implementations.
Think of me as an open book, upon whose virgin pages you shall scribe.
Admission to the eurozone was evidently misunderstood as an open invitation to new state debts, possibly concealed with various tricks.
Fortunately, Parliament can already be seen as an open house for all Europeans, which you can defend strongly.
The Union needs to continue its enlargement as an open and objective process, with no new restrictions or conditions imposed.
Let these words once again stand as an open invitation to our colleagues and all interlocutors to return to the path of normality and harmony through dialogue.
Consequently any area other than a closed area qualifies as an open area.
This party considers that the tendering process for the routes operated by CalMac was narrowly defined and cannot be considered as an open tender.
The public authorities have until now maintained Hong Kong's reputation as an open and incorrupt business centre, as Mr Cushnahan very rightly pointed out.
Mr President, this resolution must not be interpreted as an open or covert demand for protectionist measures to reduce the EU's import of textile products.
Not so much an open mind as an open mouth.
Not so much an open mind as an open mouth.
They think they know me and... in reality I am not as an open book as I may seem.
After his death, a diary was found among Gerald Schnauz's belongings, written in the second person and apparently intended as an open letter to his father.
Sun's main database product is MySQL that is available as an open source product free of charge under a GPL license.
Remains as an Open Point as this section refers to Annex B.32
I share the profound concern of those who recognise this as an open wound in Europe's polity and on behalf of the committee I extend to them my deepest sympathy and solidarity.

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we leave this question as open problem vs we leave this question as an open problem