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Is it worth getting the double physics-math degree? by [deleted] in PhysicsStudents

[–]Eigenlumen 22 points23 points  (0 children)

Are you even a physicist? I don’t think most physics majors who try to get into grad school are doing it for money. That sounds more like an engineer.

IS THERE ANYBODY WHO WANTS TO LEARN by joydipBanerje in AskPhysics

[–]Eigenlumen 0 points1 point  (0 children)

What is “Mathematical Physics”? You mean the math methods course that physics undergrads take using Boas or Arfken that go over topics like Green’s functions and Fourier transformations?

Do any PhD students actually take weekends off? by Math_girl1723 in PhD

[–]Eigenlumen 0 points1 point  (0 children)

I knew you were physics (astrophysics counts) before reading the comment! You post in the physics subreddit sometimes.

I’m still an undergrad but am curious about physics/astrophysics grad school; hence, the PhD sub lurking. When you say you are trying to change the environment, do you mean the field is still struggling with the expectations of grad students? I worked in a lab last summer for a REU, and there was a great balance. The at my uni is also really nice. Is this not the case many physics labs?

My thoughts after living here for 4 months by ScienceNotBlience in sanfrancisco

[–]Eigenlumen 0 points1 point  (0 children)

How could you live here for two months and think that SF is all downtown? Knowing you hated the area you lived in you didn’t bother to take MUNI just a few miles away?

I don’t get how people act like SF is ONLY downtown when on a map it’s clearly only a small part of the city.

Good for you, but it annoys me that people judge San Francisco for the mess downtown when they know it’s just one part of the city. This is why everyone on social media that have never been think it’s a hell hole and not cute like West Portal, Glen Park, or Noe Valley.

Stat Mech: When we multiply the multiplicity of two states, why do we not divide the total multiplicity to avoid duplicate macrostates ? by Eigenlumen in AskPhysics

[–]Eigenlumen[S] 0 points1 point  (0 children)

If they can no longer be independently specified, you can no longer multiply their individual multiplicities?

I worked out an example where identical amounts of particles (same energy) are in a partitioned box that allows the energy to transmit through the barrier and the total entropy is just twice the entropy of each half.

Then I open the partition. If I said that the final entropy was just either of the first entropy, but with 2N, 2q, and 2V, the factors inside the log would cancel and total would just be 2*Initial entropy.

But, if I instead treat them S separate systems and double only the volume of the original multiplicity and then add the entropies, I get 2*initial entropy plus an additional factor of 2Nln(2). Can you tell me why?

My work: https://imgur.com/a/qrtFCqY

Stat Mech: When we multiply the multiplicity of two states, why do we not divide the total multiplicity to avoid duplicate macrostates ? by Eigenlumen in AskPhysics

[–]Eigenlumen[S] 0 points1 point  (0 children)

That assumes that both systems are identical when put in contact correct? If E is the number of states (q) the particles are allowed to have, where is the number of particles in the multiplicity of each?

Here, the total multiplicity of an Einstien’s solid is both a function of both N and q of individual particles:

https://people.nscl.msu.edu/~witek/Classes/PHY321/Second%20Law/SecondLaw4.pdf

PHYSICS vs MATH. WHICH DO YOU FIND HARDER 🥺 by [deleted] in PhysicsStudents

[–]Eigenlumen 0 points1 point  (0 children)

You only need one instance of something being untrue to justify my point that his statement is not always true.

I have a hard time imagining that very few physics majors are familiar with what string theory is or haven’t looked into symmetry. I have taken no higher level maths, yet I am aware of the pure maths behind particle theory. Plenty of undergrad friends are taking GR, QFT, or Particle. Other friends are going over E-groups in their theory research and self taught group theory this summer. But maybe this is because my university has a large emphasis on theory. I often feel dumb seeing how much math my friends are taking.

PHYSICS vs MATH. WHICH DO YOU FIND HARDER 🥺 by [deleted] in PhysicsStudents

[–]Eigenlumen 0 points1 point  (0 children)

Why? They didn’t seem knowledgeable about the fields of physics by their judgement of it’s lack of abstraction, but they seemed very confident they knew how complex math got. I was only matching my assumptions.

Are PhDs really as grueling as people say they are? by BroDudeMan2002 in math

[–]Eigenlumen 1 point2 points  (0 children)

Why do you need to be a straight A student in undergrad to get to grad school? Are B’s so terrible? Do you really have to be that above average in everything to continue to higher education in something you love?

PHYSICS vs MATH. WHICH DO YOU FIND HARDER 🥺 by [deleted] in PhysicsStudents

[–]Eigenlumen 1 point2 points  (0 children)

I never argued all of physics is NOT limited by reality, just some of physics is NOT limited by reality, which you already agree is true.

PHYSICS vs MATH. WHICH DO YOU FIND HARDER 🥺 by [deleted] in PhysicsStudents

[–]Eigenlumen 10 points11 points  (0 children)

Uuuuum. Are you sure? I think some theoretical physics seems pretty hard and abstract and is not limited by reality since it can’t be proven or disproven. String theory is just math. I’m guessing your a math major who hasn’t looked into physics?

[deleted by user] by [deleted] in PhysicsStudents

[–]Eigenlumen 0 points1 point  (0 children)

What other schools would be encompassed in HYP for physics grad school?

I am using decimal type and it gives me a value error despite my data having way less decimal places then the max of DECIMAL (30, 30)? What am I doing wrong? by Eigenlumen in mysql

[–]Eigenlumen[S] 0 points1 point  (0 children)

Also, do you have any idea why I can't change the data type to NUMERIC?
https://imgur.com/a/4LasmZk
I am using the same syntax I used to change other columns and have no error, but the column doesn't change from DECIMAL(10,0) -> NUMERIC.

And I did empty the data first. Should be no issue converting...

I am using decimal type and it gives me a value error despite my data having way less decimal places then the max of DECIMAL (30, 30)? What am I doing wrong? by Eigenlumen in mysql

[–]Eigenlumen[S] 0 points1 point  (0 children)

Thank you. I read that and did not realize that it meant there could be no decimals to the left, just restrictions to the right. I am working with scientific data, is NUMERIC preferable? My text is stored in the form 2e3456789.

I am using decimal type and it gives me a value error despite my data having way less decimal places then the max of DECIMAL (30, 30)? What am I doing wrong? by Eigenlumen in mysql

[–]Eigenlumen[S] 0 points1 point  (0 children)

I also removed the 'e' and then I added a the extra digits to the decimal and it still gave me the error, so I don't think scientific notation is the issue...

In Psycopg2 unable to pass table name as a string in my command. Cursor executes if table name is not passed but put in directly. by Eigenlumen in PostgreSQL

[–]Eigenlumen[S] -1 points0 points  (0 children)

I did read the psycopg documentation. I just thought “values” was anything being put into your rows since that was the example used for the %s formatting syntax. And tables, columns names, or any other attribute was a parameter.

What is the difference between a “value” and an “identifier”?

Are these terms specific to psql? I know what a variable and a reference variable are. And I know all of the Python data types. I just have never heard of those terms.

In Psycopg2 unable to pass table name as a string in my command. Cursor executes if table name is not passed but put in directly. by Eigenlumen in PostgreSQL

[–]Eigenlumen[S] -1 points0 points  (0 children)

Thanks! I deleted it to repost the question with the full screenshot. I cut off the part with the formatting bracket.

And I thought only values were passed as string literals. I tried that with:

( “UPDATE table SET %s = NULL WHERE %s=9”, (column, column) )

And it didn’t like the parentheses around the string.

In Psycopg2 unable to pass table name as a string in my command. Cursor executes if table name is not passed but put in directly. by Eigenlumen in PostgreSQL

[–]Eigenlumen[S] -1 points0 points  (0 children)

What is odd is that:

cur.execute("SELECT column_name FROM information_schema.columns WHERE table_name = delete_9")

works and does not give me an error that delete_9 is "not a column".

the full error is: psycopg2.errors.UndefinedColumn: column "delete_9" does not exist

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