BdMO Online Forum

Phlembac Adib Hasan wrote:Ekta proof-er jonno eto zhamela!Ok, oi proof baad.Arecta proof diteci.

nafistiham wrote:
and, i am seeing that one's proof says it is possible another's says it is not.would anyone clear who's right ?

i see no bug in Sourav da's proof, but could not find any in adib's either (too dumb to read the giant proof at a strech)

misunderstood.

@Tiham Vaia, my proof also says either all $c_i$s are non-positive, or non-negative.I only showed that it is impossible to follow the given condition if all $c_i$s are not of same sign.And a question:My Bangla Front is not working in Forum. What can I do?

talk with *mahi* about it.
or, start a new topic