How do you know if sheet music is correct ?

[pianoplunker]

I recently downloaded a free first page sample of some sheet music written by Chopin. It is Etude Op 10 No 1 which starts with a C major arpeggio but in the sheet music, there is a pentatonic A in the first part of the C major arpeggio. Is that correct ?    There are also several other notes on this free sample first page I am not sure are correct since the piece is always performed very fast. Is there a definitive resource to verify if the music is correct ?   

[corecase]

Not sure how you could verify.. but download this one -- it's the entire sheet music and I'm certain that it should be correct: https://imslp.org/wiki/Special:ImagefromIndex/00305

[49410enrique]

it helps to ensure you have a  trusted edition in the first place, thus I am not a fan of 'free' downloaded PDF copies and such for scores you will study/learn (they can be helpful to preview before you buy though) but yeah super important to ensure the material you work with is 'trustworthy' or doesn't have questionable editing (or lack of good editing).

maybe not so much if just for personal enjoyment but for auditions, competitions, et.c some panels can be very picky and will ding you if you play something the composer did not 'write'.

feel free to cross reference w my online henle
https://www.scribd.com/doc/103208127/Chopin-Etudes-Henle-Urtext-Edition

(note i disabled downloads, prints, and copy text, as I believe the pices can be purchased from pianostreet. I reccommend if you will study this or other works, check the pianostreet urtexts and editions, they are good and inexpensive relative to the quality of the score you get vs buying bound hard copy premium stuff).

[pianoplunker]

Not sure how you could verify.. but download this one -- it's the entire sheet music and I'm certain that it should be correct: https://imslp.org/wiki/Special:ImagefromIndex/00305

Thank you for that. I am fascinated that Chopin wrote that to his friend Franz Liszt .  I am un-fascinated by the fact my free pdf does indeed contain three discrepencies on the first page alone.  For some reason your version is easier to read too. Must be the font.  Thanks

[pianoplunker]

it helps to ensure you have a  trusted edition in the first place, thus I am not a fan of 'free' downloaded PDF copies and such for scores you will study/learn (they can be helpful to preview before you buy though) but yeah super important to ensure the material you work with is 'trustworthy' or doesn't have questionable editing (or lack of good editing).

maybe not so much if just for personal enjoyment but for auditions, competitions, et.c some panels can be very picky and will ding you if you play something the composer did not 'write'.

feel free to cross reference w my online henle
https://www.scribd.com/doc/103208127/Chopin-Etudes-Henle-Urtext-Edition

(note i disabled downloads, prints, and copy text, as I believe the pices can be purchased from pianostreet. I reccommend if you will study this or other works, check the pianostreet urtexts and editions, they are good and inexpensive relative to the quality of the score you get vs buying bound hard copy premium stuff).

Thank you for the info. Although this is not for competition or audition it is still highly important for me to work out the fingering correctly from the start.  Even though I would probably only play this as a warm up type of piece , there is nothing more frustrating than taking the time to learn something and then realize it is wrong and have to re-work fingering just because a publisher didnt  edit correctly.  From your link and the other poster's link I can see in fact there are wrong notes on my first page .  The fingering would have to be different to accomodate the wrong notes.
I will probably never try for 170 bpm as this piece already reveals some flaws in my technique even at 50 bpm.  But even at 50 bpm I need to know the notes are correct.