I read the following description on page 529 of this book [1]:

```
Perhaps the simplest way to explain the essential difference between crystals that have nontrivial topological character and those that do not is the way that the electronic system behaves as atoms are brought together to form a crystal, a characterization that has been termed topological quantum chemistry.
```

Any touch up/comment/enhancement on the above sentence will be highly appreciated.

[1] https://hk1lib.org/book/6037268/3f7c7b

Regards,
HZ

On Tuesday, hongy...@gmail.com queried:
> I read the following description on page 529 of this book [1]:
>
> ```
> Perhaps the simplest way to explain the essential difference between crystals
> that have nontrivial topological character and those that do not is the way
> that the electronic system behaves as atoms are brought together to form a
> crystal, a characterization that has been termed topological quantum
> chemistry. ```
>
> Any touch up/comment/enhancement on the above sentence will be highly
> appreciated.

I see no reason for someone not a specialist in the subject to make any
change.

> [1] https://hk1lib.org/book/6037268/3f7c7b
>
> Regards,
> HZ

/dps

--
Killing a mouse was hardly a Nobel Prize-worthy exercise, and Lawrence
went apopleptic when he learned a lousy rodent had peed away all his
precious heavy water.
_The Disappearing Spoon_, Sam Kean

On Wed, 9 Mar 2022, at 01:04:37, Snidely posted:
>On Tuesday, hongy...@gmail.com queried:
>> I read the following description on page 529 of this book [1]:
>>
>> ```
>> Perhaps the simplest way to explain the essential difference between
>>crystals that have nontrivial topological character and those that do
>>not is the way that the electronic system behaves as atoms are
>>brought together to form a crystal, a characterization that has been
>>termed topological quantum chemistry. ```
>>
>> Any touch up/comment/enhancement on the above sentence will be highly
>>appreciated.
>
>I see no reason for someone not a specialist in the subject to make any
>change.

Nor do I. It seems to be good English. I would accept what the author
says.

Just to claim I'm not totally ignorant here, I am a chemistry graduate,
and I did carry out research on crystal structures a very long time ago,
when I had never met topological quantum chemistry. And I still haven't.

--
Paul

On Thursday, March 10, 2022 at 2:40:21 AM UTC+8, Paul Wolff wrote:
> On Wed, 9 Mar 2022, at 01:04:37, Snidely posted:
> >On Tuesday, hongy...@gmail.com queried:
> >> I read the following description on page 529 of this book [1]:
> >>
> >> ```
> >> Perhaps the simplest way to explain the essential difference between
> >>crystals that have nontrivial topological character and those that do
> >>not is the way that the electronic system behaves as atoms are
> >>brought together to form a crystal, a characterization that has been
> >>termed topological quantum chemistry. ```
> >>
> >> Any touch up/comment/enhancement on the above sentence will be highly
> >>appreciated.
> >
> >I see no reason for someone not a specialist in the subject to make any
> >change.
> Nor do I. It seems to be good English. I would accept what the author
> says.
>
> Just to claim I'm not totally ignorant here, I am a chemistry graduate,
> and I did carry out research on crystal structures a very long time ago,
> when I had never met topological quantum chemistry. And I still haven't.

This is a new discipline that has recently emerged and a revolutionary breakthrough in physics. See here [1] for more in-depth elaboration.

[1] https://www.nature.com/articles/nature23268

HZ

On Wed, 9 Mar 2022, at 23:15:05, hongy...@gmail.com posted:
>On Thursday, March 10, 2022 at 2:40:21 AM UTC+8, Paul Wolff wrote:
>> On Wed, 9 Mar 2022, at 01:04:37, Snidely posted:
>> >On Tuesday, hongy...@gmail.com queried:
>> >> I read the following description on page 529 of this book [1]:
>> >>
>> >> ```
>> >> Perhaps the simplest way to explain the essential difference between
>> >>crystals that have nontrivial topological character and those that do
>> >>not is the way that the electronic system behaves as atoms are
>> >>brought together to form a crystal, a characterization that has been
>> >>termed topological quantum chemistry. ```
>> >>
>> >> Any touch up/comment/enhancement on the above sentence will be highly
>> >>appreciated.
>> >
>> >I see no reason for someone not a specialist in the subject to make any
>> >change.
>> Nor do I. It seems to be good English. I would accept what the author
>> says.
>>
>> Just to claim I'm not totally ignorant here, I am a chemistry graduate,
>> and I did carry out research on crystal structures a very long time ago,
>> when I had never met topological quantum chemistry. And I still haven't.
>
>This is a new discipline that has recently emerged and a revolutionary
>breakthrough in physics. See here [1] for more in-depth elaboration.
>
>[1] https://www.nature.com/articles/nature23268
>
Thank you for this. I didn't even know that there were exactly 230
symmetry groups.

Such ignorance must be inexcusable nowadays.
--
Paul

On 10/03/2022 11:47 am, Paul Wolff wrote:
> On Wed, 9 Mar 2022, at 23:15:05, hongy...@gmail.com posted:
>> On Thursday, March 10, 2022 at 2:40:21 AM UTC+8, Paul Wolff wrote:
>>> On Wed, 9 Mar 2022, at 01:04:37, Snidely posted:
>>> >On Tuesday, hongy...@gmail.com queried:
>>> >> I read the following description on page 529 of this book [1]:
>>> >>
>>> >> ```
>>> >> Perhaps the simplest way to explain the essential difference between
>>> >>crystals that have nontrivial topological character and those that do
>>> >>not is the way that the electronic system behaves as atoms are
>>> >>brought together to form a crystal, a characterization that has been
>>> >>termed topological quantum chemistry. ```
>>> >>
>>> >> Any touch up/comment/enhancement on the above sentence will be highly
>>> >>appreciated.
>>> >
>>> >I see no reason for someone not a specialist in the subject to make any
>>> >change.
>>> Nor do I. It seems to be good English. I would accept what the author
>>> says.
>>>
>>> Just to claim I'm not totally ignorant here, I am a chemistry graduate,
>>> and I did carry out research on crystal structures a very long time ago,
>>> when I had never met topological quantum chemistry. And I still haven't.
>>
>> This is a new discipline that has recently emerged and a revolutionary
>> breakthrough in physics. See here [1] for more in-depth elaboration.
>>
>> [1] https://www.nature.com/articles/nature23268
>>
> Thank you for this. I didn't even know that there were exactly 230
> symmetry groups.
>
> Such ignorance must be inexcusable nowadays.

231. I've just formed a new one. Two bassists, of course - finding a
left-hander bassist isn't as easy as it used to be, but we managed. The
vocalist has had to change his hairstylist to centre-parting.

Our first hit will be a riff on Bach's "Crab Canon".

--
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within

On Thu, 10 Mar 2022, at 12:05:12, Richard Heathfield posted:
>On 10/03/2022 11:47 am, Paul Wolff wrote:
>> On Wed, 9 Mar 2022, at 23:15:05, hongy...@gmail.com posted:
>>> On Thursday, March 10, 2022 at 2:40:21 AM UTC+8, Paul Wolff wrote:
>>>> On Wed, 9 Mar 2022, at 01:04:37, Snidely posted:
>>>> >On Tuesday, hongy...@gmail.com queried:
>>>> >> I read the following description on page 529 of this book [1]:
>>>> >>
>>>> >> ```
>>>> >> Perhaps the simplest way to explain the essential difference between
>>>> >>crystals that have nontrivial topological character and those that do
>>>> >>not is the way that the electronic system behaves as atoms are
>>>> >>brought together to form a crystal, a characterization that has been
>>>> >>termed topological quantum chemistry. ```
>>>> >>
>>>> >> Any touch up/comment/enhancement on the above sentence will be highly
>>>> >>appreciated.
>>>> >
>>>> >I see no reason for someone not a specialist in the subject to make any
>>>> >change.
>>>> Nor do I. It seems to be good English. I would accept what the author
>>>> says.
>>>>
>>>> Just to claim I'm not totally ignorant here, I am a chemistry graduate,
>>>> and I did carry out research on crystal structures a very long time ago,
>>>> when I had never met topological quantum chemistry. And I still haven't.
>>>
>>> This is a new discipline that has recently emerged and a
>>>revolutionary breakthrough in physics. See here [1] for more
>>>in-depth elaboration.
>>>
>>> [1] https://www.nature.com/articles/nature23268
>>>
>> Thank you for this. I didn't even know that there were exactly 230
>>symmetry groups.
>> Such ignorance must be inexcusable nowadays.
>
>231. I've just formed a new one. Two bassists, of course - finding a
>left-hander bassist isn't as easy as it used to be, but we managed. The
>vocalist has had to change his hairstylist to centre-parting.
>
>Our first hit will be a riff on Bach's "Crab Canon".
>
Do I need to re-read Goedel, Escher, Bach? (No, I'm not speaking Welsh.)
--
Paul

On 10/03/2022 11:15 pm, Paul Wolff wrote:
> On Thu, 10 Mar 2022, at 12:05:12, Richard Heathfield posted:
>> On 10/03/2022 11:47 am, Paul Wolff wrote:
>>> On Wed, 9 Mar 2022, at 23:15:05, hongy...@gmail.com posted:
>>>> On Thursday, March 10, 2022 at 2:40:21 AM UTC+8, Paul Wolff wrote:
>>>>> On Wed, 9 Mar 2022, at 01:04:37, Snidely posted:
>>>>> >On Tuesday, hongy...@gmail.com queried:
>>>>> >> I read the following description on page 529 of this book [1]:
>>>>> >>
>>>>> >> ```
>>>>> >> Perhaps the simplest way to explain the essential difference
>>>>> between
>>>>> >>crystals that have nontrivial topological character and those
>>>>> that do
>>>>> >>not is the way that the electronic system behaves as atoms are
>>>>> >>brought together to form a crystal, a characterization that has been
>>>>> >>termed topological quantum chemistry. ```
>>>>> >>
>>>>> >> Any touch up/comment/enhancement on the above sentence will be
>>>>> highly
>>>>> >>appreciated.
>>>>> >
>>>>> >I see no reason for someone not a specialist in the subject to
>>>>> make any
>>>>> >change.
>>>>> Nor do I. It seems to be good English. I would accept what the author
>>>>> says.
>>>>>
>>>>> Just to claim I'm not totally ignorant here, I am a chemistry
>>>>> graduate,
>>>>> and I did carry out research on crystal structures a very long time
>>>>> ago,
>>>>> when I had never met topological quantum chemistry. And I still
>>>>> haven't.
>>>>
>>>> This is a new discipline that has recently emerged and a
>>>> revolutionary  breakthrough in physics. See here [1] for more
>>>> in-depth elaboration.
>>>>
>>>> [1] https://www.nature.com/articles/nature23268
>>>>
>>> Thank you for this. I didn't even know that there were exactly 230
>>> symmetry groups.
>>>  Such ignorance must be inexcusable nowadays.
>>
>> 231. I've just formed a new one. Two bassists, of course - finding a
>> left-hander bassist isn't as easy as it used to be, but we managed.
>> The vocalist has had to change his hairstylist to centre-parting.
>>
>> Our first hit will be a riff on Bach's "Crab Canon".
>>
> Do I need to re-read Goedel, Escher, Bach?

No, I think you've remembered all you need to.
..ot deen uoy lla derenmemer ev'uoy kniht I, oN

--
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within