Do these sentences make sense?

[liuchunsheng123456]

1) Although I am learning Math, I don't really like it.
2) Although learning Math, I don't really like it.

Could you tell me whether they are right, especially the second one.
Many thanks in advance.

[Marius Hancu]

The first one is OK:

37 on "Although I'm learning"
http://books.google.com/books?lr=&q=%22Although+I%27m+learning%22&btnG=Search+Books

The 2nd one sounds as a bad reduction of the 1st, and wouldn't recommend it, even though it's understandable.

I'm curious what others will make of it.

"Although" doesn't seem to work well with this "-ing form" of the verb, it prefers nouns (including "learning" as noun) or adjectives after it:

2) Although learning Math seems interesting to some, I don't really like it.

815 on "Although learning"
http://books.google.com/books?lr=&q=%22Although+learning%22&btnG=Search+Books

[OddThomas]

Liuchunsheng has happened upon the participial phrase, a phrase that acts as an adjective.

A participial phrase can be a modifier at the beginning of a sentence, as in Although learning Math, I don't really like it, or a parenthetical phrase within a sentence.

Participial phrases use present or past participles as verbs without subjects, followed usually by a direct object, and often with adverbs and other clause elements, to modify a noun they are immediately next to.

Here is a past participle example: Determined to be an astronaut, I left for college full of hope and enthusiasm.

Here is a participial phrase in error, called the misplaced modifier, that does not modify the noun it is placed next to: After borrowing my friend's car, it ran out of gas. (Ask: what does the phrase modify? Certainly not it.)

Back to the question at hand, I think that Liuchunsheng's second sentence is acceptable.

[Marius Hancu]

I tried to find interdictions for the 2nd, couldn't find any, thus it should be OK, as OddThomas mentioned.

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The nonfinite clause may be with or without a subject.

....

(iii) -ING PARTICIPLE

without subject: Leaving the room, he tripped over the mat.

with subject: Her aunt having left the room, I asked Ann for some personal help.

Quirk, p. 993
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Subordinators for -ing clauses

Clauses with an -ing particple may be introduced by any of the subordinators:

although, as if, ....

Quirk, p. 1005
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Subordinators and structural types of clauses

Clauses of concession are introduced by although or its more informal variant though. Other subordinators used with concessive clauses are:

if, even if, even though, when, whereas, while, and whilst <BrE>

While not wanting to seem obstinate, I insisted on a definite reply.

Quirk, p. 1097
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The last sentence can be replaced by:

Although not wanting to seem obstinate, I insisted on a definite reply.

which is similar to the original 2nd sentence.

BTW, it should be math, not Math:

http://books.google.com/books?q=%22learning+math%22&lr=&sa=N&start=200

[Marius Hancu]

However, while the 2nd is correct and equivalent with the first, I don't like the crowded style. As well, it sounds artificial, and others told me the same.

[OddThomas]

I agree, Marius, about the sentence sounding artificial.

Often we write sentences we wouldn't speak. Perhaps this is one of those sentences a student would put into a letter to an adult about how things are going at school: "Dear Uncle Marius...."